Revision mode colors disappear

Hello,

I’m noticing that in revision mode, sometimes the colors disappear. For example, I added some text in revision mode that was blue a few days ago. When I went in today, the text was black. The text is still there, only it’s not blue any more. Other “blue revisions” are there, as well as my new “orange revisions.” It seems to happen randomly. I do close Scrivener and do a backup each night.

Unless this is supposed to happen? Revision mode is new to me…