Welcome to the forum.
The first two thoughts that come to my mind:
Battery power and something dragging/dirty mechanism.
That's all I got. Sorry. There are others that should be more help than that.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.