I had a very similar issue to this that I finally diagnosed last night. I couldn’t get star alignment to work at all. Each time I’d try to align with any star or planet it would just be way out. Then after reading this I decided to check my mount. What had happened to me was the other week the mount had pushed against the Declination motor and knocked out out slightly. I had put it back but not properly. I didn’t realise that there are two gears there and it was engaging with the wrong one!
I’m so happy it’s now sorted because it was really frustrating.