Delay in showing new currency when selecting a new currency

src/libs/Navigation/Navigation.ts

@@ -19,6 +19,7 @@ import originalGetTopmostReportId from './getTopmostReportId';
 import linkingConfig from './linkingConfig';
 import linkTo from './linkTo';
 import navigationRef from './navigationRef';
+import setNavigationActionToMicrotaskQueue from './setNavigationActionToMicrotaskQueue';
 import switchPolicyID from './switchPolicyID';
 import type {NavigationStateRoute, State, StateOrRoute, SwitchPolicyIDParams} from './types';
 
@@ -384,6 +385,7 @@ export default {
     resetToHome,
     isDisplayedInModal,
     closeRHPFlow,
+    setNavigationActionToMicrotaskQueue,
 };
 
 export {navigationRef};

src/libs/Navigation/setNavigationActionToMicrotaskQueue.ts

@@ -0,0 +1,13 @@
+export default function setNavigationActionToMicrotaskQueue(navigationAction: () => void) {
+    /**
+     * The function is used when the app needs to set a navigation action to the microtask queue, it guarantees to execute Onyx.update first, then the navigation action.
+     * More details - https://github.com/Expensify/App/issues/37785#issuecomment-1989056726.
+     */
+    new Promise<void>((resolve) => {
+        resolve();
+    }).then(() => {
+        requestAnimationFrame(() => {
+            navigationAction();
+        });
+    });
+}

src/pages/iou/request/step/IOURequestStepCurrency.tsx

@@ -61,7 +61,8 @@ function IOURequestStepCurrency({
         if (pageIndex !== 'confirm') {
             IOU.setMoneyRequestCurrency(transactionID, option.currencyCode, action === CONST.IOU.ACTION.EDIT);
         }
-        navigateBack(option.currencyCode);
+
+        Navigation.setNavigationActionToMicrotaskQueue(() => navigateBack(option.currencyCode));
     };
 
     return (

src/pages/workspace/WorkspaceProfileCurrencyPage.tsx

@@ -20,7 +20,7 @@ function WorkspaceProfileCurrencyPage({policy}: WorkspaceProfileCurrencyPageProp
 
     const onSelectCurrency = (item: CurrencyListItem) => {
         Policy.updateGeneralSettings(policy?.id ?? '', policy?.name ?? '', item.currencyCode);
-        Navigation.goBack();
+        Navigation.setNavigationActionToMicrotaskQueue(Navigation.goBack);
     };
 
     return (