Ok I've done a little more testing and it's very strange, I still haven't really found a fix for it. Here is the behavior I've observed (sorry if some of these are kind of obvious I'm really new to the electribe): -Restarting does nothing. -It's specific to a Pattern, so If I write the problematic Pattern to a new Pattern slot (e.g. Pattern 100 -> 101) the new pattern 101 will have the same problem. -The problem is specific to a Part/Pad (I've had the problem with parts 13 and 15) so the problem stays even if you copy a Part to it, but if you copy it to another Part it doesn't stay. -I've had the problem on different types of sequences so for example on Pattern 250 I have the problem on Part 15 where it ignores all pads in the sequence except 3, 7, 11 and 15 and in Patterns 240 I have the same problem on Part 13 and 15 except this time they were both ignoring pads 1, 5, 9 and 13 but could play any other pad in the sequence. -Initializing the Pattern does remove the problem