Transaction I mark as "interest" keeps getting unmarked?

I’ve marked a transaction as interest, and it shows up that way in the transaction log, and also in the tax center. However, when I look again in a day or two, the transaction is no longer marked as interest. I mark it again, and again in a day or two it is no longer marked as interest. I’m trying to mark it as “payment” now to see if that holds firm, but I am concerned about the robustness of this interest marking in general.

This continues to happen. Interest tags are falling off transactions after a day or two. This is an unacceptable bug in a product whose main use case is reliable tracking for tax purposes. I’m marking as “payment” as a workaround for now, but my confidence in cointracker is really shaken.