[Mfleigle]

And I don't know about:

If you're using the sdhost driver, switch to the mmc driver and see if the problem goes away.

If you haven't added dtoverlay=sdhost to config.txt you'll be using the standard mmc driver, which is fine.

One other thing to do would be to run "bcmstat.sh cgxpd10" in an ssh window, this will allow you to monitor various system stats up until the point where the system freezes (make the ssh window wide enough to prevent the lines from wrapping). If ARM or GPU memory is being leaked somewhere, this could explain the freeze.

I'll try the ssh command.

The only other change I have done since this problem started is I switched from using tx3g/srt subtitles to using Advanced Substation Alpha. I'm not sure if that's relevant but thought I'd add that.