Thank you, Paul.
I am not sure if I understood correctly.
I only work with Joomla 4.
Here is my exact problem: I created a language switcher module and placed it in a custom position that I created in the Helix3 layout editor. The pagebuilder was not involved at all in this process, and it worked perfectly. However when I updated from PB3.8 to PB4, the module suddenly was empty space.
Same thing happened to a footer menu module I created (inside pagebuilder) - it worked perfectly until the PB 4 Update, but now it is broken.
I was assuming that downgrading PB might help here. Can I simply install the old Pagebuilder via the Joomla Update System and overwrite the PB-Version 4?
Thanks!