Text boxes not letting me type

When I edit a document in Adobe Acrobat I choose "Edit PDF" and then click on a text box. The cursor appears in the text box and I can perform only one or two actions before it stops letting me make any changes. I can backspace, type a letter, arrow the cursor over, press enter, but once I do one of these things the text box is no longer editable. If I make a new text box I can type a couple letters really fast before the box freezes. I can paste text into the boxes.

I uninstalled and re-installed to the latest version, I checked to make sure there were no privacy settings enabled, and I created a fresh document and this still happens. This happens on huge documents and small documents. I have no forms in these documents either.