I don't know but it seems that pic corruption happens somehow ... I've seen just about every permutation possible ... from stuck on, to stuck off, to a mixture like your seeing.
Things I have wondered about with the zeus:
1) PIC chips: Do they all need to have the default firmware in them if they are NOT programmed to a certain channel range?
It doesn't seem to really matter, but I do flash them all just to be safe and just program the channels I want to use
2) CHANNELS used: does it matter if you use say channels 1,2,3,4 ... or is using 6,8,9,11 just as good? Issues with skipping?
It doesn't seem to matter
3) PIC question: could a corrupted PIC in say channel 1, affect the operation of other channels, like 2,3,4 ? Or no relationship?
The wild part is I see them all going out together, never a partial failure. That makes me think they are linked together somehow and the problem seems to cause all other pics to be affected somehow.
I'm convinced that either voltage fluctuations or out of bounds pixelnet data can corrupt the pics somehow. I've had xlights sequences with imported LOR sequencing layer where
a certain sequence will cause a zeus to get wiped out.
I'm also not sure if power supplies can cause these problems, or bad lights could cause ... not sure at all