I think it's Kodi since I'm not getting any of the "BIOS" level text messages on the screen. Corrected...
I think it's LibreElec since I'm getting a LE splash Screen then the Kodi Logo, then the Main menu screen when it crashes.
Just a barely gray box (center 2/3s of screen) and then the Kodi reboot screen(s). It appears to completely reload Kodi properly but will again crash if I browse one of the directory's with the pictures.
It seems to be related to the presence/absence of the thumbnails. If the thumbnails are completely built in the directory, it appears the crash does not happen. If the thumbnails are not completely built for the directory, it will crash sooner or later. As far as I can tell, it doesn't matter how many pictures are in the directory, or the size of the pictures themselves. If the thumbnails are all there, it doesn't crash; if they aren't all built, it will.
I just reloaded and re-installed and found there's another "symptom". When it crashes, and reloads, and I re-enter the Pictures menu selection, it shows the "First Run help" screen as though I haven't been into this menu selection. When I click "OK", it does show the top level thumbnails (that are built from the subdirectory contents), even though it just said it was the first time in. Evidently a flag is getting wiped as part of the crash that tells the skin I've been here before...
Not every top level thumbnail is built. There are about 10 not built, scattered thru the top level screens, even though some at the very end of the directory are done....
I know what you mean about getting useful info...haven't been able to capture anything...