Hi Michiel,
I experienced a issue similar to the related onto the Mx 9.18.2 fix → https://docs.mendix.com/releasenotes/studio-pro/9.18/#fixes
In My case, The error started after a Windows 11 cumulative .NET update…
(https://support.microsoft.com/en-gb/topic/october-11-2022-kb5017271-cumulative-update-for-net-framework-3-5-and-4-8-1-for-windows-11-version-22h2-535ac8db-c89b-43f7-abd7-a3c3240320e6)
Probably the froze issue is related to .NET vs Mendix…
Because, after uninstall kb5017271 freezes errors disappeared.
( and later on the KB5020622 for Windows 11, version 22H2, seems to fixed something as well)
Att
Solution is to close the Connector view
Problem still occurs, but less if you close each page / change in de modeler piece by piece.
So do not a re-run and do not save all changes in once.
I use to have a lot of trouble with Mendix freezing, until I start working with branches, that solved the problem.
if your not the only one working on the same development branch I gets super slow. I suggest you to create your own one. if you need help with this please comment and I can guide you.
Hope you find the solution !