Red crosses in Levels tab

Hello!

Previously we had 2 type of icons in Levels Tab - saved and needs to be saved.

Now, in 4.20, I see some red crosses.

248955-2018-07-30-2018.png

What does it means? I can’t find anything about in documentation or 4.20 release notes.

Thanks!

According to editor sources - this should be indicator of file editing lock. O_o

I also find this confusing and could not find any documentation on it.