When you look on the Messages or Preflight Result tabs, does it show an error or warning related to that font?
In any case, I suggest you open a technical support ticket through our website. An agent will try and reproduce the behavior and escalate it should the need arise.
I believe this font is not working because it is a so called “variable font”. Going to run some tests with that. I guess the internal browser does not know how to handel those.
I can confirm that variable fonts do not work in the current version of OL Connect. Ran a quick test on a future version (post 2023.2 release), that version does support it (no eta yet).