Logic Pro 10.4.1 ANOTHER BUG

This is tiring now. i have found another bug. this time it is pretty bad, in the undo history.

I saved a new project alternative and wanted to undo an error but now the undo history, although it shows up will not let me undo anything.

This together with the export bug I found means i will be rolling back to 10.3.3 again....

shame really. I had hoped they had fixed the disaster that was 10.4