I had also same problem in previous project. I was copying the views between the projects and in some point this checkbox stops working.
Everything seems to be configured good. Even the appConfig.json has line:
No errors in logs either.
During this copying we switched from TWStudio 1.10 to 1.11 and then to 1.12.
Thanks for all the answers. As mentioned by Adam Macierzyński I copied a view and I use CSS to customize it. There was no switching of versions between the project I copied it from and the project I copied it in (Version 1.12). There are no error logs. At the moment there are two views in the project.
So the reason why hiding the menu doesn't work anymore is that I copied a view? Martin Wassmann, is there any other recommended way to create and reuse view templates?