I think I found a bug.
Been tweaking a plane for a couple hours to make it more stable n altitude flight tests.
Then flaps stopped working out of nowhere on lift off, like, they do turn up n down but don't act as a flap, become unable to manoeuvre besides start/stop the engine.
Then tried to fly a variant of that n another different design i made before. None of their flaps did work as mentioned above.
I've tried turn off and back on the flap bearings, unglue the flaps, break the bearing, exit and the the world... Nothing