Undo button Bug

When recording Audio the undo button isn’t functioning. The History page is visible but does not respond.
It may work on the first ‘pass’ …but once only.
This is only happening on one project and as a consequence I am unable to run cycle recording.
I assume this is a bug ? Any help appreciated.
When I test with a new project all works. Is there a way to transfer all tracks to a new project.
I am frazzled!!



When this happens I cannot delete with the erase tool .!!!

Yes. From your new empty project

File/Import/Tracks From Project