Installed on Chromebook - All good except lots of text on different apps is super bold?

Use bitdefender on most of my devices, very happy with it.

I just installed on my new Chromebook as i'm allowed it on several devices. During the install there was an option for something to do with bold text or high contrast and i think it said it was experimental or something..

Now when I open the Bitdefender app most of the text is in an outlined bold. I can't find any option to change this back.

Worryingly it also happening on other things such as my gmx email app, both are pictured below.

Can anyone advise how to reverse this?

Thanks