diff --git a/lib/selectors/thread-selectors.js b/lib/selectors/thread-selectors.js
--- a/lib/selectors/thread-selectors.js
+++ b/lib/selectors/thread-selectors.js
@@ -39,7 +39,10 @@
 import type { ClientEmojiAvatar } from '../types/avatar-types';
 import type { EntryInfo } from '../types/entry-types.js';
 import type { MessageStore, RawMessageInfo } from '../types/message-types.js';
-import type { MinimallyEncodedThreadInfo } from '../types/minimally-encoded-thread-permissions-types.js';
+import type {
+  MinimallyEncodedRelativeMemberInfo,
+  MinimallyEncodedThreadInfo,
+} from '../types/minimally-encoded-thread-permissions-types.js';
 import type { BaseAppState } from '../types/redux-types.js';
 import { threadPermissions } from '../types/thread-permission-types.js';
 import {
@@ -320,7 +323,9 @@
     relativeMemberInfoSelectorForMembersOfThread(threadID),
     (
       threadInfo: ?RawThreadInfo,
-      members: $ReadOnlyArray<RelativeMemberInfo>,
+      members: $ReadOnlyArray<
+        RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+      >,
     ): boolean => {
       if (!threadInfo) {
         return false;
diff --git a/lib/selectors/user-selectors.js b/lib/selectors/user-selectors.js
--- a/lib/selectors/user-selectors.js
+++ b/lib/selectors/user-selectors.js
@@ -11,6 +11,7 @@
 import SentencePrefixSearchIndex from '../shared/sentence-prefix-search-index.js';
 import { getSingleOtherUser } from '../shared/thread-utils.js';
 import type { ClientEmojiAvatar } from '../types/avatar-types';
+import type { MinimallyEncodedRelativeMemberInfo } from '../types/minimally-encoded-thread-permissions-types.js';
 import type { BaseAppState } from '../types/redux-types.js';
 import { userRelationshipStatus } from '../types/relationship-types.js';
 import { threadTypes } from '../types/thread-types-enum.js';
@@ -112,9 +113,10 @@
 
 const relativeMemberInfoSelectorForMembersOfThread: (
   threadID: ?string,
-) => (state: BaseAppState<>) => $ReadOnlyArray<RelativeMemberInfo> = _memoize(
-  baseRelativeMemberInfoSelectorForMembersOfThread,
-);
+) => (
+  state: BaseAppState<>,
+) => $ReadOnlyArray<RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo> =
+  _memoize(baseRelativeMemberInfoSelectorForMembersOfThread);
 
 const userInfoSelectorForPotentialMembers: (state: BaseAppState<>) => {
   [id: string]: AccountUserInfo,
diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -1666,7 +1666,7 @@
 
 function switchMemberAdminRoleInThread(
   threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
-  memberInfo: RelativeMemberInfo,
+  memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   isCurrentlyAdmin: boolean,
   dispatchActionPromise: DispatchActionPromise,
   changeUserRoleServerCall: (
diff --git a/web/modals/threads/members/change-member-role-modal.react.js b/web/modals/threads/members/change-member-role-modal.react.js
--- a/web/modals/threads/members/change-member-role-modal.react.js
+++ b/web/modals/threads/members/change-member-role-modal.react.js
@@ -11,7 +11,10 @@
 import SWMansionIcon from 'lib/components/SWMansionIcon.react.js';
 import { otherUsersButNoOtherAdmins } from 'lib/selectors/thread-selectors.js';
 import { roleIsAdminRole } from 'lib/shared/thread-utils.js';
-import type { MinimallyEncodedThreadInfo } from 'lib/types/minimally-encoded-thread-permissions-types.js';
+import type {
+  MinimallyEncodedRelativeMemberInfo,
+  MinimallyEncodedThreadInfo,
+} from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import type { RelativeMemberInfo, ThreadInfo } from 'lib/types/thread-types';
 import { useDispatchActionPromise } from 'lib/utils/action-utils.js';
 import { values } from 'lib/utils/objects.js';
@@ -25,7 +28,7 @@
 import UnsavedChangesModal from '../../unsaved-changes-modal.react.js';
 
 type ChangeMemberRoleModalProps = {
-  +memberInfo: RelativeMemberInfo,
+  +memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
 };
 
diff --git a/web/modals/threads/members/member.react.js b/web/modals/threads/members/member.react.js
--- a/web/modals/threads/members/member.react.js
+++ b/web/modals/threads/members/member.react.js
@@ -11,7 +11,10 @@
 } from 'lib/shared/thread-utils.js';
 import { stringForUser } from 'lib/shared/user-utils.js';
 import type { SetState } from 'lib/types/hook-types.js';
-import type { MinimallyEncodedThreadInfo } from 'lib/types/minimally-encoded-thread-permissions-types.js';
+import type {
+  MinimallyEncodedRelativeMemberInfo,
+  MinimallyEncodedThreadInfo,
+} from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import {
   type RelativeMemberInfo,
   type ThreadInfo,
@@ -31,7 +34,7 @@
 const commIconComponent = <CommIcon size={18} icon="user-edit" />;
 
 type Props = {
-  +memberInfo: RelativeMemberInfo,
+  +memberInfo: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
   +setOpenMenu: SetState<?string>,
 };
diff --git a/web/modals/threads/members/members-list.react.js b/web/modals/threads/members/members-list.react.js
--- a/web/modals/threads/members/members-list.react.js
+++ b/web/modals/threads/members/members-list.react.js
@@ -7,7 +7,10 @@
 
 import { useENSNames } from 'lib/hooks/ens-cache.js';
 import { stringForUser } from 'lib/shared/user-utils.js';
-import type { MinimallyEncodedThreadInfo } from 'lib/types/minimally-encoded-thread-permissions-types.js';
+import type {
+  MinimallyEncodedRelativeMemberInfo,
+  MinimallyEncodedThreadInfo,
+} from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import {
   type ThreadInfo,
   type RelativeMemberInfo,
@@ -18,7 +21,9 @@
 
 type Props = {
   +threadInfo: ThreadInfo | MinimallyEncodedThreadInfo,
-  +threadMembers: $ReadOnlyArray<RelativeMemberInfo>,
+  +threadMembers: $ReadOnlyArray<
+    RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+  >,
 };
 
 function ThreadMembersList(props: Props): React.Node {
@@ -43,14 +48,18 @@
         .map(([letter, users]) => {
           const userList = users
             .sort((a, b) => stringForUser(a).localeCompare(stringForUser(b)))
-            .map((user: RelativeMemberInfo) => (
-              <ThreadMember
-                key={user.id}
-                memberInfo={user}
-                threadInfo={threadInfo}
-                setOpenMenu={setOpenMenu}
-              />
-            ));
+            .map(
+              (
+                user: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo,
+              ) => (
+                <ThreadMember
+                  key={user.id}
+                  memberInfo={user}
+                  threadInfo={threadInfo}
+                  setOpenMenu={setOpenMenu}
+                />
+              ),
+            );
           const letterHeader = (
             <h5 className={css.memberletterHeader} key={letter}>
               {letter.toUpperCase()}
diff --git a/web/modals/threads/members/members-modal.react.js b/web/modals/threads/members/members-modal.react.js
--- a/web/modals/threads/members/members-modal.react.js
+++ b/web/modals/threads/members/members-modal.react.js
@@ -9,6 +9,7 @@
   roleIsAdminRole,
   threadHasPermission,
 } from 'lib/shared/thread-utils.js';
+import type { MinimallyEncodedRelativeMemberInfo } from 'lib/types/minimally-encoded-thread-permissions-types.js';
 import { threadPermissions } from 'lib/types/thread-permission-types.js';
 import { type RelativeMemberInfo } from 'lib/types/thread-types.js';
 import { useRolesFromCommunityThreadInfo } from 'lib/utils/role-utils.js';
@@ -42,7 +43,7 @@
   const allMembers = React.useMemo(
     () =>
       threadMembersNotFiltered.filter(
-        (member: RelativeMemberInfo) =>
+        (member: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo) =>
           searchText.length === 0 || userIDs.includes(member.id),
       ),
     [searchText.length, threadMembersNotFiltered, userIDs],
@@ -51,8 +52,9 @@
   const roles = useRolesFromCommunityThreadInfo(threadInfo, allMembers);
   const adminMembers = React.useMemo(
     () =>
-      allMembers.filter((member: RelativeMemberInfo) =>
-        roleIsAdminRole(roles.get(member.id)),
+      allMembers.filter(
+        (member: RelativeMemberInfo | MinimallyEncodedRelativeMemberInfo) =>
+          roleIsAdminRole(roles.get(member.id)),
       ),
     [allMembers, roles],
   );