There's a CC64 bug in SQ-80 V 1.3.0.2545 (V Collection 9, installed today), similar to the bug in B-3 V2 2.4.0.1552 and Analog Lab V 5.3.0.1552.
Here's the issue:
If I hold a key and engage the sustain pedal (or engage the sustain pedal and then hold a key), then let go of the key and press it again while continuing to hold the sustain pedal — the note stops sounding when I release the sustain pedal, even though the key is still held. Wack.
Sometimes, maybe 1 out of every 30 notes or so, sustain behaves as expected, but mostly it's broken.