I know I've posted on this issue before. I've also seen a few similar threads going back several years but there has never been a fix posted, and the threads have been closed. The suggested workarounds to schedule known transfers in advance helps a bit, but the underlying problem doesn't only affect internal transfers. Sometimes it's Zelle payments or some other outgoing payments being categorized as transfers to the same account.
I've been using Quicken for a long, long time and prior to this issue, the only time I have ever seen quicken create a transaction with a transfer back to the same account is for opening balance transactions when adding a new account.
In the cases shown below, Quicken shouldn't put anything in the category column. It should be blank. How is this happening and why does it seem limited to just a few of us?
The auto categorizing of deposits and payments as transfers to the same account are happening with, 1) No category information in the downloaded data, 2) Auto Categorize set to off, 3) No memorized transactions with transfers as the category and, 4) "Complete fields using previous entries" is unchecked.
Here are some screenshots with examples. They are downloads using OSU that were not automatically entered into the register (though if they were, they would be entered as they appear below). The transactions are selected but not yet accepted.
(Hopefully redacted enough to hide personal info while showing details of the issue)
These are all from my NFCU checking account, but I've seen it happen to some of my Chase accounts too.