a logical thing to do would be to try out your wow settings without algo switching, so you will know is it related to gpu's not released correctly, driver crash, or it's just the algo.
Agreed. I left the miner mining exclusively cn-wow for the last 5 hours and had zero problems so far. In an algo-switching scenario I'd have already encountered at least 6-7 crashes in the same time frame - it really depends on how many times the algorithm switches. It might be also helpful to say that this crash happens sometimes and right after the algo switch. Sometimes it will switch to cn-wow and mine normally, sometimes it will lead to crashing GPUs and subsequently mining with 10-15% of the hashrate until miner restarts.
I can leave it mining wownero for a longer time, but I'm almost ready to discard this being an overclock issue.
Is the miner crashing or the video driver? Do you get the 'hardware blocked..' system message ?