I use Mullvad, but do find it can be glitchy with certain web pages. ( corrects when I switch it off, but that defeats the purpose of VPN if I have to deactivate it. )

Usually when an image is attached, it can often need a page refresh to get the graphics.

Also Youtube will ask me to reconnect to the internet after a period - an irritant, yes, but an irritant nonetheless when running a playlist and it just pauses.