Thanks a lot i've busy with work.You have a few options. I would first try to update/reinstall emummc firmware with daybreak first to see if that fixes your issue.
If that doesn’t work you can then try wiping the emummc and restoring from backup, creating new emummc from scratch, or creating/ restoring emummc to a new card!
Hereand here are a few threads that will help you if you have to mess with the SD card !
Edit: Here is a video that will help you out tremendously if you have to mess with SD card and emummc. Wish this was a thing when I upgraded my SD, would have been much smoother.
Hope you get it sorted!
I noticed it crashed not all the time but occasionally
maybe SD card failure