MIDI input suddenly too picky for chords

Suddenly my MIDI input is too picky for chords. If I don’t play the notes exactly together (and I mean exactly), it inputs them as a series of individual pitches.

And I’m a pianist by training, so it’s not a user fail…

Any suggestions? This is KILLING me. Not sure where it came from, never had a problem before.

Edit: a restart seems to have fixed it. Odd, but ok. I’ll leave it in case it’s helpful for others.