add comment to markSubmitExpenseEnd call

Author: OlimpiaZurek

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

@@ -1027,6 +1027,8 @@ function IOURequestStepConfirmation({
                 },
             });
 
+            // IMPORTANT: Every branch below must call markSubmitExpenseEnd() after dispatching the expense action.
+            // This ensures the telemetry span started above is always closed, including inside async getCurrentPosition callbacks.
             if (iouType !== CONST.IOU.TYPE.TRACK && isDistanceRequest && !isMovingTransactionFromTrackExpense && !isUnreported) {
                 createDistanceRequest(iouType === CONST.IOU.TYPE.SPLIT ? splitParticipants : selectedParticipants, trimmedComment);
                 markSubmitExpenseEnd();