Sorry, don't know what going on, but here's one more shot in the dark.

There are times when my mount loses its park position, seems to lose its orientation in general. Often this correlates to a KStars/Ekos crash, and perhaps some file gets corrupted.
To repair that, I find that following the instructions on this page fixes things: stellarmate.com/support/faq/mounts.html?view=faq&faqid=33
Perhaps that's what happened to you. Perhaps when you re-installed 3.5.2, it somehow updated whatever file got corrupted?
If/when you retry 3.5.3, if you have the same issue, try the procedure on that link and see if it fixes things up.

Hy

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