I have 8 575E's up for a production that is running right now. 2 of them are randomly lamping themselves off and doing a full reset. Once homed, they will obey DMX commands until the lamp restrikes, then they do a global reset again. Once the lamp is on, it seems to be another 8-10 minutes before the lamps turn off and the cycle is repeated. The DMX chain was the first thing I checked, but with E-Scans and scrollers on the same chain that don't even twitch when the DS's do their thing and the chain being terminated, I'm sure that the DMX is not the problem. Thoughts?

Console: Strand 520i
Fixutres: 575E Design Spots w/ isolated circuit
Home run: All 5-pin DMX cable with a splitter in-line

Addition:

Same problem with console turned off. No voltage drop (metered and steady at 121V).