Sometimes, I still see the <br> characters on the glossary pane.
This entry (automatically duplicated; I don't know why) was created a few days ago with a text editor and added to CT's glossary via clipboard. As long as I remember, the sentences in the note (coverage ...; it provides ...) were pasted from a web source.
Entries created natively with CT are Okay.
I've seen this duplicate display too. Cannot remember what caused it.
At the moment, the only solution is to delete such an entry and add a completely new one from CT.
It looks like the Web entry copied into the glossary via the external text editor contains html codes such as <br>, and you did not notice it or your text editor does not display the codes. Just a guess.
The <br> issue appears when the glossary contains synonyms and it is set to search all the fields. It will be fixed for the coming update.