Hi,
If I put Custom CSS in the right field in the Helix (edited) framework, it is stored but not being output to the screen, so it does not work.
Site: Joomla 4.2.6, PHP 8.1, Helix 2.0.11 dated 2018-02-01 (??), SP Page builder 4.0.6 2014-09-01
Please check.
Best,
Eric