Hi vicscaff,
I can see how tricky it is when a single transaction is holding things up. In many cases, this kind of reconciliation error can happen when there's a large number of unreconciled bank transactions in the account. Here's a fix for this:
To load more transactions to reconcile, the customer must add the month, day, and year to the URL for the relevant period they're trying to reconcile. The following is a standard URL on the Reconcile accounts page.

Use the following format to replace the coloured sections:
- Replace <GUID> with the business GUID. If the customer is already logged in, they do not need to change the GUID. Learn more
- Replace <Month> <Day> <Year> with the period they're trying to reconcile for.
- Type ?bankBalanceDate, then %2F and %2F in between the months, days, and years in the URL.

This workaround helps because the system times out when there are too many transactions to load. Enter a date for a period with fewer transactions to help with reconciling translations.
Regards,
Sai