I had something akin to this happening with my computer feeding USB to my Lampizator Golden Gate DAC, where every time the AC kicked in the music stopped for ~ 5 - 8 seconds, but then it would reestablish connection and continue. Of course that gap drove me nuts! Worse yet, it wasn't just my AC, but also my many neighbors' AC systems that triggered this event. I'm guessing a momentary power line sag occurred from the start up capacitors in the AC systems.
I tried a Topaz isolation transformer on the line, both in normal mode and in balanced mode, and it did not help. What did solve this problem for me was to try a PS Audio P-10 power regenerator. This stopped the maddening interruptions that I was suffering, and it actually sounded almost as good as my best power feed set up (Topaz in balanced feeding a very expensive power cord feeding an equally expensive HB Marble power distribution bar). Now I have enjoyed continuous play for 18 months and counting. It might be worth a try in your system (and might give your system's sound quality a boost, too).
I tried a Topaz isolation transformer on the line, both in normal mode and in balanced mode, and it did not help. What did solve this problem for me was to try a PS Audio P-10 power regenerator. This stopped the maddening interruptions that I was suffering, and it actually sounded almost as good as my best power feed set up (Topaz in balanced feeding a very expensive power cord feeding an equally expensive HB Marble power distribution bar). Now I have enjoyed continuous play for 18 months and counting. It might be worth a try in your system (and might give your system's sound quality a boost, too).