ARP Latch not working properly... sometimes

As the title says, the LATCH button doesn’t work all the time. This is curious because on my other patches it does.

There is an 8 step sequence, and holding down the key cycles through it. But pressing a key while LATCH is highlighted does not work, it will stay at step 1 and not progress to the other steps.

What gives? Any other people have this prob before?