PO-133 | Problem when live recording on pattern chains

So I was messing around with my new Po-133 and I was trying to Live Record a melody on a drum pattern chain, 4 patterns long. The problem is, the Pocket Operator doesn’t seem to record the first note or the first melody pattern altogether, leading the whole melody to get out of sync from the drum pattern I wanted to record on.

I’ve spent a good couple hours trying to understand the issue and searching for this problem online, to no avail. An extra problem is the behavior is difficult to pin down, it seems inconsistent and it looks like it presents itself when using more than 2 patterns in a chain, while I was sometimes able to live record correctly with a chain of just 2 patterns. But again, it still happened sometimes even with a shorter chain.

Could it be just a faulty unit?