Multidomain-System, no rendering of mask elements

[mrkbr]

Hi,

I installed headless_mask with composer on a T3 12.4.23 with PostgreSQL Multidomain System. As soon as it is installed, it wont render normal mask elements in den Frontend of a Multidomain site that has headless NOT enabled and where the headless_mask typoscript template is NOT included.

Is there something I can do, or is this a special use case that is not and will not be working?

Best,
Mario