I am on version 21.3.0.755
It does it with every file when I try to save and export or export and save, my feeling is that CD 2019 does not have the ability to use the different processors with export and save at the same time.
2018 and 2017 saves using a different processor that the one that the program is running and export uses a different one than the program and save is using. I can not see if 2019 does the same because it kills the program before you can check it.