vendors automatically being removed from vendor maintenance

Version 2014

I have a client that sometimes enters vendors on the fly in Invoice Data Entry.

The invoice updates fine, and a check is entered for the invoice.

Today, the check register displayed an error, indicating the vendor was not on file.

The vendor name printed on the check, but it was missing on the stub.

The fix has been to manually recreate the vendor in Vendor Maintenance.

This problem does not happen every time they enter a vendor "on the fly", but it seems to happen sporadically.

Has anyone else seen this problem?

Is there a fix?