when i tried moving 2 glued brass funnel with mechanical piston at first everything was ok but when piston came back filter that was in the funnel magicly disappear.
I hope that it's going to be fixed...

lemme add to this issue: when we with Kazii was testing my elevator, we had similar issue - analog lever put in redstone link frequency slot was disappearing. It happened several times, and then it was fine as usual... no logs btw, but later we might explore it