Automatic liftgate keeps opening lower

[raadsel]

I'm curious if anyone else has seen this issue, or knows of a simple fix. When I select to open my liftgate, it tends to open a little lower than I want it, where it would be easy for me to bang my head on the latch hanging down off the back of the liftgate. I'll set it in the way I remember the manual saying to do it (push the liftgate to the desired height and then hold the liftgate button until it beeps) and sometimes it will even open to the correct height the next couple of times. However, just as open, the next time I open the liftgate, it will open lower than I set. Worse, each successive time that I open the liftgate, it again opens lower -- or, it will actually open all the way and then slowly lower down, until it is lower than the last time it opened. Once it starts going to low, again, I will try to reset the liftgate height.

 

Has anyone else had this issue and what is the fix? Is there some trick to getting the liftgate height to permanently set that I'm missing?

[JAZ]

Perhaps check/replace liftgate struts?

[raadsel]

Perhaps check/replace liftgate struts?

 

It doesn't appear to be struts, though I could be wrong. As I said, sometimes after resetting it the door will open to the height I set, just not more than a few times.. Also, if I push up the door, after it opens too low, it has no issue staying at that height. And even when it goes down, it acts as if it is lowering to a particularly height. Instead, the issue appears to be something with the "memory" of the door, that it keeps going back to a "default" height despite my trying to reset it.