For a few months the information in the tray balloon is displayed using the default **Fixedsys **fonts (instead of the usual Arial (?)) which is ugly and takes much more space than usual (last configuration : v1.64 / WIndows 10 Pro 64)
I never really paid attention to the balloon but I think you may find that this is a MS configuration rather than a BC one. I don’t think there’s any way to alter that in BC itself.
By the way, you do know that the current version is 1.79 (and I wouldn't call a different font a 'bug' as it doesn't affect the operation of the app)