I deleted a project and saw it in Trash over several days with the expiry counting down to zero. I recovered it to cut and paste an entry into another project then deleted it again. Then the Trash option disappeares when I chose Projects from the Settings icon. The project came back with no issues but I couldn't delete it again. See screenshots below...


Now the trash is back but I can't permanently delete it. Now when I try, I get an email from Jira:
We could not delete this project.
It is probably a temporary problem. Go to trash and try again.
I do with no change in behavior