I tried it again now (not that I wasn't sure, I start MSFS 2024 dozen of times every day) and I can only repeat and confirm it doesn't happen here.
Please follow all the suggestions in the manual on Page 97, and most importantly,wait before restarting again if it's the first time after an update, because on the first restart it's rebuilding the models cache, and if you restart it before it's done, it will start again, and again, so you do into a loop.
Try to close the menu, restart the Couatl engine, wait 20-30 seconds, then open the menu.