Hello Scott,
I know the feeling.
I have the same version running on Raspberry PI/Astroberry. In my last session, I had it twice, each time involving the FITS viewer, once when clicking the histogram icon and once when just bringing it to the front.
I could not find any thing relevant in /var/log/messages or other log files in /var/log
I run on a PI with 8GB memory, so lack of memory shouldn't be the problem.
Next time I'll activate the debug logging, but looking at the weather report, that will not be for any time soon
g.

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