I've been searching through the forum looking for the polar alignment issue that I had last night (not easy with a limit of 20 results). In any case, I had an issue with the polar alignment refresh last night that seems similar to the one reported here. Although I did not get any crashes, I did have problems with the FITS Viewer refresh during polar alignment.

The main issue seemed to be that the FITS viewer would not refresh. I went through the PA tool multiple times, I'd get to the PA result, toggle to the full screen FITS Viewer, select a star, Alt-Tab back to the PA tool, click Next then click refresh and although the "Image #" was incrementing every second the FITS viewer was not refreshing the image. Hard to do the alignment without the refresh.

I had used the PA tool the night before without issue so I was trying figure out what I changed to break it. Ultimately it seemed to be related to using dark images. The previous evening I did not used Dark images and earlier in the day I had created a set of new dark images using the Dark Library tool. So, I had enabled the dark check box on the Align tool. As soon as I unchecked the Dark box the FITS Viewer refresh started working again.

Another note, it seems that the KStars 3.5.8 version now has a minimum refresh of 1.0 second. I'm pretty sure I used to use 0.5 seconds with Update PA Error on.

I'm using KStars 3.5.8 on Ubuntu 20.04.4 LTS. Guide camera is QHYCCD QHY5 III 178C.

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