My 2011 Ford Edge has been having this problem for years. Checked the fuse, looked at the struts, reset liftgate settings, disconnected battery, etc. I had to change out the car battery for a different reason and it fixed my liftgate problem. Although, it had to be a battery from AutoZone though (Duralast). I had been using Interstate batteries from Costco for years. For some reason, it made a difference using a Duralast battery. It's been a year and the liftgate functions properly.