Reorder modular children with drag&drop

I used Grav v1.5.10 and Admin v1.8.20 to build a Onepager.
In Admin I was able to set Folder Numeric Prefix to enabled From within a modular child, and then was able to reorder the modular children with drag&drop.
Worked like a charm.

After the update to Grav v1.6.3 it seems this does not work anymore.

I did a fresh install of Grav v1.6.3 and Admin v1.9.0, and also was not able to set a modular childs Folder Numeric Prefix to enabled. When I set Folder Numeric Prefix to enabled in the UI and save it, it changes back to disabled.

Has this feature been removed or am I missing something?

I can confirm it is still working on my end, after updating 1.5 > 1.6.3.

Thanks, this is good news!
So I'll look into this further...

Possibly my Problem was related to this issue
https://github.com/getgrav/grav-plugin-admin/issues/1648

After upgrading to admin v1.9.1 everything is working seamlessly again.
Thank you for this wonderful cms!