Rendering Problem | New NC 20 install

I created a fresh install of NC20 on a Ubunut 20 server with Mariadb, Apache2, Redis, APCu, PHP7.4

Using Firefox (Latest), but experiencing the same with Chrome (Latest), I see rendering problems.

Does any recognise this (see images / screen prints).

Thanks
Frank

Seems that one of these Header setings is causing this.

Apache2 config settings:
Header always set X-XSS-Protection “1; mode=block”
Header always set x-Frame-Options “SAMEORIGIN”
Header always set X-Content-Type-Options “nosniff”
Header always set Content-Security-Policy “default-src ‘self’; font-src *;img-src * data:; script-src *; style-src *;”
Header always set Referrer-Policy “strict-origin”