Entity names not showing up in history

I have been doing a lot of experimentation/deleting/renaming. Have things working the way I want, except that I have two entities whose current names do not show up in the history graph; the names that appear are names that were there earlier today.

Here’s what I see for the history, and entity entries for an entity that shjows up with an incorrect name, and one that shows up with a correct one.

How do I clean this up?

Have you tried clearing your web browser cache?

yes, I did.

from experimentation, it appears that the name displayed is the friendly name from the first state change being plotted. All it took was some wait time…