I am seeing a very similar bug to one I reported a while back “PC scroll increment with wraparound skips 0”.
This time it is with incrementing CC counter values and having the %F0 display variable work correctly.
When I increment past 128 back to 0, the initial value displayed by %F0 is 2 rather than 1. It skips 1, and then the labeling is off by 1. (It says 2 when its actually 1, 3 when actually 2, etc)