you for reaching out on the community and telling us about your issue. How long have you been experiencing this issue? Are you on the BOA account are you using express web connect or direct connect? Depending which method you're using I would take a look at the article here for further troubleshooting. One other thing I can think of potentially is trying to deactivate and reactivate the account. If you're using QBP you will also need to reset that back up and can be done doing the same steps as the reactivate article but selecting the set up now button in the online bill payment box instead.
Please let me know how it goes!