Just an update. This issue is resolved although I can't say how. My SD card failed and I restored a backup to an M.2 NVME, For some reason no issue with three simultaneaous presses there. I then restored the same backup to another SD and no issues there either. I believe the issue came about after my last backup when I updated the controller profiles. Since my backup was pre-update it doesn't seem to be present there. I'll update the software on the card and see what breaks it and report back in case anyone ever has this issue again.