I haven't seen it with Word, which I use quite a lot, but there is one similar and extremely long-standing bug. When you use a keyboard shortcut to turn bold/it

I haven't seen it with Word, which I use quite a lot, but there is one similar and extremely long-standing bug. When you use a keyboard shortcut to turn bold/italics on, then type a word immediately before a non-whitespace character, then use the shortcut to turn it back off, it will un-bold the thing you just bolded. So annoying.