diff --git a/lib/selectors/account-selectors.js b/lib/selectors/account-selectors.js
--- a/lib/selectors/account-selectors.js
+++ b/lib/selectors/account-selectors.js
@@ -47,12 +47,11 @@
 
 const basePreRequestUserStateForSingleKeyserverSelector: (
   keyserverID: string,
-  // eslint-disable-next-line no-unused-vars
 ) => (state: AppState) => PreRequestUserState = keyserverID =>
   createSelector(
     (state: AppState) => state.currentUserInfo,
     cookieSelector,
-    sessionIDSelector,
+    sessionIDSelector(keyserverID),
     (
       currentUserInfo: ?CurrentUserInfo,
       cookie: ?string,
diff --git a/lib/selectors/keyserver-selectors.js b/lib/selectors/keyserver-selectors.js
--- a/lib/selectors/keyserver-selectors.js
+++ b/lib/selectors/keyserver-selectors.js
@@ -30,8 +30,13 @@
   },
 );
 
-const sessionIDSelector: (state: AppState) => ?string = (state: AppState) =>
-  state.keyserverStore.keyserverInfos[ashoatKeyserverID]?.sessionID;
+const baseSessionIDSelector: (
+  keyserverID: string,
+) => (state: AppState) => ?string = keyserverID => (state: AppState) =>
+  state.keyserverStore.keyserverInfos[keyserverID]?.sessionID;
+
+const sessionIDSelector: (keyserverID: string) => (state: AppState) => ?string =
+  _memoize(baseSessionIDSelector);
 
 const baseUpdatesCurrentAsOfSelector: (
   keyserverID: string,
diff --git a/lib/selectors/server-calls.js b/lib/selectors/server-calls.js
--- a/lib/selectors/server-calls.js
+++ b/lib/selectors/server-calls.js
@@ -33,7 +33,7 @@
   createSelector(
     cookieSelector,
     urlPrefixSelector(keyserverID),
-    sessionIDSelector,
+    sessionIDSelector(keyserverID),
     (state: AppState) => state.currentUserInfo,
     connectionSelector(keyserverID),
     lastCommunicatedPlatformDetailsSelector(keyserverID),
diff --git a/lib/shared/session-utils.js b/lib/shared/session-utils.js
--- a/lib/shared/session-utils.js
+++ b/lib/shared/session-utils.js
@@ -38,7 +38,7 @@
       preRequestUserState.cookiesAndSessions[ashoatKeyserverID].cookie !==
         cookieSelector(currentReduxState) ||
       preRequestUserState.cookiesAndSessions[ashoatKeyserverID].sessionID !==
-        sessionIDSelector(currentReduxState))
+        sessionIDSelector(ashoatKeyserverID)(currentReduxState))
   );
 }
 
diff --git a/web/selectors/socket-selectors.js b/web/selectors/socket-selectors.js
--- a/web/selectors/socket-selectors.js
+++ b/web/selectors/socket-selectors.js
@@ -47,15 +47,22 @@
   keyserverID: string,
 ) => (state: AppState) => ?() => WebSocket = _memoize(baseOpenSocketSelector);
 
+const baseSessionIdentificationSelector: (
+  keyserverID: string,
+) => (state: AppState) => SessionIdentification = keyserverID =>
+  createSelector(
+    cookieSelector,
+    sessionIDSelector(keyserverID),
+    (cookie: ?string, sessionID: ?string): SessionIdentification => ({
+      cookie,
+      sessionID,
+    }),
+  );
+
 const sessionIdentificationSelector: (
-  state: AppState,
-) => SessionIdentification = createSelector(
-  cookieSelector,
-  sessionIDSelector,
-  (cookie: ?string, sessionID: ?string): SessionIdentification => ({
-    cookie,
-    sessionID,
-  }),
+  keyserverID: string,
+) => (state: AppState) => SessionIdentification = _memoize(
+  baseSessionIdentificationSelector,
 );
 
 const getSignedIdentityKeysBlobSelector: (
diff --git a/web/socket.react.js b/web/socket.react.js
--- a/web/socket.react.js
+++ b/web/socket.react.js
@@ -45,7 +45,9 @@
 
     const openSocket = useSelector(openSocketSelector(ashoatKeyserverID));
     invariant(openSocket, 'openSocket failed to be created');
-    const sessionIdentification = useSelector(sessionIdentificationSelector);
+    const sessionIdentification = useSelector(
+      sessionIdentificationSelector(ashoatKeyserverID),
+    );
     const preRequestUserState = useSelector(
       preRequestUserStateForSingleKeyserverSelector(ashoatKeyserverID),
     );