Yep, I have a CEM70 and it does that (although not always).
No big issue for me because I setup and tear down every night. Might be an issue (or better, an annoyance) for ppl with observatory and stable setup though.
My workflow is: setup everything, staying awake a bit to check that all is working fine, going to bed because meridian flip and auto-park will take care of everything, wake up and see that parking is horizontal (even though I set vertical) and, most of the time, still reporting slewing to. Therefore I click "goto home", turn off everything, etc