I had the same problem while going from version 1.8.1 to version 1.8.5 (bleeding under Fedora).
The "reverse" button no longer worked and the focuser used the direction opposite to that requested.
It was not EKOS (Kstars) which was in question since I had the same problem through PyIndi.
The recompiled version 1.8.5 also didn't work.

However, yesterday's git version works again.
I would not have had the idea if I had not seen this post.
Thank you very much !

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