I have found no solution, and the customary ENTER key does not work until I click on the save dialog,nor file name, nada, and this all used to work smoothly. Search turns up no other cases of this.
I usually just curse at it and call it names.
Most of my focus issues are at work, so I have no idea what is a macOS issue and what is an issue with the stuff the company installed.
On my personal Mac and phone, I submit feedback to Apple all the time when things annoy me, since those issues are more clear cut.
Notifications should be non-blocking. ALWAYS.