LED drop during cue playback

I am getting a weird drop on my LED rigs across 5 campuses (6 different rooms and desks) - 1 FB and 5 PCs. When Go is pressed to trigger the next cue all of the LEDs in the rig drop by 50% and then fade up to the recorded level. The only time this does not happen is when the faders are at full or off. I have anywhere from 1 to 5 LED faders depending on the room and the drop is happening in all of them. The problem was not there in release 3.5.1 but showed up after I upgraded to 3.6.0. Normally I would just go back a version but I cleaned out my show files and overwrote the current files (not my best move). Any suggestions on what is causing this?