Same here, I am going to create a support ticket.
The issue occurs if the project has (a lot of) excluded documents. There is an accidental slow-down in the rendering of the project explorer tree which only happens if you have excluded documents.
We are indeed working on 7.23.1 to fix this.
If you do not have excluded documents, you can keep on using 7.23.0.
Update: 7.23.1 is out!
Yeah there are some (performance) issues with this version, best to wait until 7.23.1
Great idea! We will see if others has the problem, too.
7.23.1 is there. Let’s see if it solves the problem.
The save action seemed to be fast as before, so these are good news.
Thank you Mendix for the bugfix!