Edit text in acrobat put special characters at beginning of text

I've been using the edit text option in Acrobat DC for many years, and although it could sometimes be unpredictable, in general it worked ok. Lately though, edit text seems to have gone crazy. When I add a new block of text it defaults to right align justification regardless of what I set before hand and, if I add a character like an exclamation mark at the end of a sentence, it moves it to the beginning of the text. I've tried it with different fonts and get the same problems so it isn't font specific. 

Anyone else had this problem and found a solution?