diff --git a/src/libs/actions/Report/index.ts b/src/libs/actions/Report/index.ts
index 0ff89bfa98c8..0d4714796921 100644
--- a/src/libs/actions/Report/index.ts
+++ b/src/libs/actions/Report/index.ts
@@ -1334,11 +1334,9 @@ function openReport(params: OpenReportActionParams) {
     // TODO: allPersonalDetails fallback should be removed in follow-up PRs https://github.com/Expensify/App/issues/73656
     const participantAccountIDList = participants.map((p) => p.accountID).filter((id): id is number => id !== undefined);
 
-    const optimisticReport = reportActionsExist(reportID)
-        ? {}
-        : {
-              reportName: allReports?.[`${ONYXKEYS.COLLECTION.REPORT}${reportID}`]?.reportName ?? CONST.REPORT.DEFAULT_REPORT_NAME,
-          };
+    const existingReportName = allReports?.[`${ONYXKEYS.COLLECTION.REPORT}${reportID}`]?.reportName;
+    const isCreatingNewReport = !isEmptyObject(newReportObject);
+    const optimisticReport: Partial<Pick<Report, 'reportName'>> = reportActionsExist(reportID) || !existingReportName ? {} : {reportName: existingReportName};
 
     const optimisticData: Array<
         OnyxUpdate<
@@ -1367,8 +1365,10 @@ function openReport(params: OpenReportActionParams) {
         },
     ];
 
-    // Only add the report update if optimisticReport has data
-    if (Object.keys(optimisticReport).length > 0) {
+    // We need a report update for both:
+    // 1) existing reports with a known name, and
+    // 2) new reports, because the new-report flow mutates optimisticData.at(0) into a SET on REPORT_<id>.
+    if (isCreatingNewReport || Object.keys(optimisticReport).length > 0) {
         optimisticData.unshift({
             onyxMethod: Onyx.METHOD.MERGE,
             key: `${ONYXKEYS.COLLECTION.REPORT}${reportID}`,
@@ -1568,7 +1568,6 @@ function openReport(params: OpenReportActionParams) {
     }
 
     // If we are creating a new report, we need to add the optimistic report data and a report action
-    const isCreatingNewReport = !isEmptyObject(newReportObject);
     if (isCreatingNewReport) {
         // Change the method to set for new reports because it doesn't exist yet, is faster,
         // and we need the data to be available when we navigate to the chat page