Position picklist on administrator modules is...

When using a module (in my case a custom module in cpanel position) in the admin area the picklist for the positions is empty.

And Maybe as a side effect this module is now not showing up in the backend anymore. On another site I have not touched this field and that module is still visible (not sure if it's related yet).

Now you can only type the module position yourself. Seems the picklist is "broken".

Yes, sorry I did not mention J4 at first.

Just tried the latest build but the issue is still there.
I can create a module in the admin area (tried type custom), assign to position cpanel through the picklist. This works fine, module shows up.

Then install AMM and try to add the same module again but then the picklist is broken for some reason.
After de-installing the AMM module the picklist is functioning again.

Yes, the picklist is working now but the module is not showing up in the admin area yet. I tried reselecting the position but that did not work.

Perfect, thank you very much.