diff --git a/native/redux/redux-setup.js b/native/redux/redux-setup.js
--- a/native/redux/redux-setup.js
+++ b/native/redux/redux-setup.js
@@ -49,6 +49,7 @@
 import { persistConfig, setPersistor } from './persist.js';
 import { processDBStoreOperations } from './redux-utils.js';
 import type { AppState } from './state-types.js';
+import reduceGlobalThemeInfo from './theme-reducer.js';
 import { defaultNavInfo } from '../navigation/default-state.js';
 import { getGlobalNavContext } from '../navigation/icky-global.js';
 import { activeMessageListSelector } from '../navigation/nav-selectors.js';
@@ -213,6 +214,11 @@
     return state;
   }
 
+  state = {
+    ...state,
+    globalThemeInfo: reduceGlobalThemeInfo(state.globalThemeInfo, action),
+  };
+
   if (action.type === setCustomServer) {
     return {
       ...state,
@@ -246,13 +252,8 @@
       connectivity: action.payload,
     };
   } else if (action.type === updateThemeInfoActionType) {
-    return {
-      ...state,
-      globalThemeInfo: {
-        ...state.globalThemeInfo,
-        ...action.payload,
-      },
-    };
+    // Handled above by reduceGlobalThemeInfo
+    return state;
   } else if (action.type === updateDeviceCameraInfoActionType) {
     return {
       ...state,
diff --git a/native/redux/theme-reducer.js b/native/redux/theme-reducer.js
new file mode 100644
--- /dev/null
+++ b/native/redux/theme-reducer.js
@@ -0,0 +1,47 @@
+// @flow
+
+import { siweAuthActionTypes } from 'lib/actions/siwe-actions.js';
+import {
+  logOutActionTypes,
+  deleteAccountActionTypes,
+  logInActionTypes,
+  registerActionTypes,
+} from 'lib/actions/user-actions.js';
+import { setNewSessionActionType } from 'lib/utils/action-utils.js';
+
+import { updateThemeInfoActionType, type Action } from './action-types.js';
+import {
+  type GlobalThemeInfo,
+  defaultGlobalThemeInfo,
+} from '../types/themes.js';
+
+export default function reduceGlobalThemeInfo(
+  state: GlobalThemeInfo,
+  action: Action,
+): GlobalThemeInfo {
+  if (
+    action.type === logInActionTypes.success ||
+    action.type === siweAuthActionTypes.success ||
+    action.type === registerActionTypes.success
+  ) {
+    return defaultGlobalThemeInfo;
+  } else if (
+    action.type === setNewSessionActionType &&
+    action.payload.sessionChange.currentUserInfo &&
+    action.payload.sessionChange.currentUserInfo.anonymous
+  ) {
+    return defaultGlobalThemeInfo;
+  } else if (
+    action.type === logOutActionTypes.started ||
+    action.type === logOutActionTypes.success ||
+    action.type === deleteAccountActionTypes.success
+  ) {
+    return defaultGlobalThemeInfo;
+  } else if (action.type === updateThemeInfoActionType) {
+    return {
+      ...state,
+      ...action.payload,
+    };
+  }
+  return state;
+}