Yes. There are instructions posted here for repairing a corrupt file: Corrupt or Otherwise Broken Audacity Project Recovery 
However, none of the corrupt files I have seen exhibit the symptoms you are describing. 
Have you checked that you have sufficient available disk? You should have at least 3 times the size of your .aup3 file available - and you need even more for undo space: a simple amplify will double the size of disk being used before you save and exit Audacity.
If you try the recovery efforts and are still having problems later on, let me know. I’ll take a look at your .aup3 project then.