Long words disappear
When typing very long words using a paragraph text, at some point (after a certain amount of characters), the text just disappears completely. Especially when using text to create walls of numbers or something (not using expressions to maintain the control) this gets very annoying. This bug has been filed 2010 already and is still present.
Tim Drage commented
Just discovered this myself too and that people have been reporting it since CS4 to no avail! https://forums.adobe.com/thread/682344