[LH2417]: Text Disappearing in window on shifting focus

So, I opened up two files.

When I went into one file to edit it, some (not all) of the text in the other document disappeared. (See SideOne.png)

Even when I selected the other window and made it the one with the focus, the text was not visible. I had to select another file, and then re-select the file I wanted the text in for the text to re-appear.

But when I did that, some of the text in the original window disappeared. (See SideTwo.png)

This is probably the bug from the release notes:

Yes, this is a known bug. We’ve got it entered into our system. Thanks!