Only one mini that I have noticed, which is even weirder. But I'll try to pay attention to the others, it's hard to be at every tank at schedule start and stop. I just happened to be in the room watching a movie with my 4yo to see last nights' drift. I'll write it down so I don't forget which is doing what.I haven't had any problem with mine. In fact, I just ordered another two K7 pros. Are you only having the issue with the minis? Maybe @Zach B can assist.
I kind of feel like after the power supply fiasco that unfolded a while ago that noop hasn't been around, I'll try to contact Zach about it.
Thanks!