Hi,
Its not just the fonts, It happens to video playback too, YouTube, Instagram, Netflix, Showmax, and even Amazon Prime etc. The video will just display black while the sound plays and if you move the mouse a bit, bocks of the video restores but disappears if the mouse if moved a bit to far and if the mouse is moved to either the corners of the screen, it sometimes display the full frame of the video.
The only work around i could find to solve the problem is to either run the site though Microsoft edge or google Chrome or stream it through VLC player, which leads me to believe that there are a graphical error within ccleaner browsers as it does the same thing over a number of systems (laptops and pc's and the latest laptop i tested on is an HP Pavilion 2022 model.
The font size has not been altered to display bigger or smaller than the website intended, so that is not the issue. I think it s the incorrect call functions to the the graphics card for display that results in these display errors.