Bug uhm....

Looks normal to me, also, but I use dark theme. Let me try default.

EDIT: Samesies. Also, damn this is bright. Mine eyes, they do mourn.
My eyes are sensitive, lol.

I dark theme everything. As a programmer, it's the only way that I can stand to look at a monitor for hours on end.
I've never seen that myself either. It looks like the remove formatting icon got distorted on your end, but I don't know why. Unless its happening to other people though, then it may just be a hiccup with your browser. Is it like that all the time, or just sometimes?