I’m having a problem that wasn’t an issue before. the building plate on my printer won’t go down at all. When it does, it only stops half ways and doesn’t move any further. I am able to lift it back up myself manually but this doesn’t resolve the issue. until now I’ve been able to print without any problems and none of my prints have really come out with any deformities. does anyone know what might have caused the plate to suddenly stop moving up and down properly?