fix: clear synchronous quote handoff

Author: pedronfigueiredo

app/components/Views/confirmations/components/info/custom-amount-info/custom-amount-info.test.tsx

@@ -1279,6 +1279,22 @@ describe('CustomAmountInfo', () => {
       view.rerender(createCustomAmountInfo());
     }
 
+    it('clears the handoff for synchronous updates without quote signals', async () => {
+      const view = render();
+
+      await act(async () => {
+        fireEvent.press(view.getByText(strings('confirm.edit_amount_done')));
+      });
+      await act(async () => {
+        await new Promise<void>((resolve) => setTimeout(resolve, 0));
+      });
+
+      expect(view.getByTestId('bridge-fee-row')).toBeOnTheScreen();
+      expect(
+        view.getByTestId(ConfirmationFooterSelectorIDs.CONFIRM_BUTTON),
+      ).not.toBeDisabled();
+    });
+
     it('shows fee rows for same-chain payment without quotes', async () => {
       useTransactionPayHasSourceAmountMock.mockReturnValue(false);
       useTransactionPayQuotesMock.mockReturnValue([]);

app/components/Views/confirmations/components/info/custom-amount-info/custom-amount-info.tsx

@@ -328,7 +328,19 @@ export const CustomAmountInfo: React.FC<CustomAmountInfoProps> = memo(
       ) {
         setIsAmountUpdateComplete(false);
         setIsAmountUpdating(false);
+        return;
+      }
+
+      if (!isAmountUpdateComplete) {
+        return;
       }
+
+      const handoffTimeout = setTimeout(() => {
+        setIsAmountUpdateComplete(false);
+        setIsAmountUpdating(false);
+      }, 0);
+
+      return () => clearTimeout(handoffTimeout);
     }, [isAmountUpdateComplete, isQuotesLoading, quotesLastUpdated]);
 
     const wasPrefillPending = useRef(isPrefillPending);