Font size in comments changes between documents, sometimes very small

In the last week or two, we have been having an issue of the font in the comments being so small they're nearly impossible to read. This happens sometimes. Other times, it shows up as Helvetica 24, which I used on a previous document's comment. My Preferences (Edit: Preferences: Commenting: Viewing Comments) is set to Arial size 14.

When I get the very small size comment font, open the comment pane, and select the comment, the font icon stays grayed out. This is whether the text is selected or not. 

In creating a new comment, I was able to get the font icon to allow selection, I changed it to Times Roman 24. However, the text is still very small when I type, about 1 mm on a printed page.

I have tried Check for Updates, Repair Installation, and rebooting the machine, but I'm still having the issue.