In revit 2020 there is an issue with the project browser stability. Each time you open a new model the project browser shrinks and you have to resize it to your desired width.
It's very annoying. I'm using revit 2020.2.3, latest update at the time, and it still runs improperly.
The autodesk support answer is that the issue has been solved in the 2021 version and that we should update to that version.
THIS IS NOT A SOLUTION!
We need a proper support for all revit version. Isn't the subscription fee for this?