When sleeping create windmills stop producing stressunits put continues to visually rotate, simple resetting the windmill by right clicking it twice fixes it. Unsure if it effects other power sources.

create-fabric-0.5.0.i-991+1.19.2
sleepwarp-2.0.0+1.19.2

I'll take a look into this, but I'm not entirely sure I can fix this on my end.