I'm getting the same error in the last day. Before that I mined for about 60 hours without any problems. But now that error keeps popping up and restarting the miner and sometimes the rig.
6x 1050ti, my OC settings are more or less stable, running on Claymore with the same settings with no problems. But I would prefer Phoenix, the hash rate is better.
In Claymore you can override this problem by switching off temperature and fan speed stats by typing "-tt 0" into the batch file. The same command isn't recognized by Phoenix, maybe somebody has some suggestions on that matter for Phoenix?