Last year I helped a local ham with a dds vfo for his homemade qrp direct conversion transceiver, and I had to include a receive offset lo, because of the same thing you were experiencing. With a signal generator we started testing and the incoming signal would be heard a bit from the dial freq. ( I don’t remember how much of an offset I added). I’m guessing the incoming signal was “zero-beating” the lo of the dc receiver.
Looking at the minion mini page, it says that there is an software update happening.
Hopefully, that solves the issues.
Other than that, it looks like a nice little trx, too bad they didn’t include a keyer though…