What happens if buyer pays at last minute and trade period ends before seller can confirm payment receipt?

I’m fed up with BTC buyers that pays at last minute, like 5 or 3 minutes before end of trade period.
I just have those 3 or 5 minutes (or less) to confirm receipt of payments, which is a bad thing because I want to be able to wait a few conf to confirm receipt.
I guess they are trying to get my security deposit during arbitration step.
Is that phenomenon known to Bisq team, and what would happen if I can’t confirm receipt in time due to extremely late payment?