This was a known issue in 2020.1 -- When you choose to print both Checks and Electronic payments in the same check run. However, for the life of me I can't find the Sage KB article. I did find that it was fixed in 2020.2.
Check and Electronic Payment Processing - Bank Code is now updated correctly for
Electronic Payment when Printing both Checks and Electronic Payments.
DevID 112688
------------------------------
David Overholt
DWD Technology Group
------------------------------