Filmstrip own preview doesn't have any height

For some reason our jitsi web-ui doesn’t show any height on your own video preview in the filmstrip. See screenshot:

I presume it’s a config issue but cannot seem to figure out which one.
Anyone any idea?

Possibly FILM_STRIP_MAX_HEIGHT in interface_config.js?

I have that set to 120, but not much changes.
Commenting it out doesn’t seem to help either.