it kinda seems like that the torches power sideways when updated in a weird way. (just a theory)
maybe, but after messing with the bug it looks like the torches effect each other. (don't know if that's what you meant)
example 1: the bug doesn't happen when the columns of torches aren't next to each other.
example 2: when there are 3 columns the middle one malfunctions. when cutting the input of the first column the middle one works again and the third row malfunctions
also i use 1.5 tick pulses so the torches shouldn't burnout.
it's in the description. unless you mean something else
i did it i think. i made a contraption which shows the problem. (i may have messed the link up not sure)
ok i'll do my best
did some more tests and it's starting to looks like my theory is correct