Though it could be a problem with the
dimmer.
Dimmer heats up, and can't regulate heat it could fail.
I had an issue a year or so ago when one of my smartpacks lost its fan, so it would heat up, over-temp, shut off, cool off, turn on, and so on. It was rather annoying during that show when a third of the rig randomly turned on and off....
It is unlikely that it is this, of course, since your only loosing one
fixture.
How is
power to this
fixture run? It could be a loose connection
in one of the cables that is getting kinked for some reason. It could also be an issue with a contact in the
base of the
fixture. It could also be a million other things, sadly.
It could also be a programing error, for that matter.
Try putting a different
fixture in its place, if the problem ends then your issue is with the
fixture, in which case you (or someone who knows what their doing in there) should open the cap up and see what the problem is. If the problem persists, then its time to check out the
system.
Good luck
Zac