Validator not showing events properly

As I've been adding events into my game they have been showing up promptly in the Validator window, but if I clear the events then play my game they stop showing until I restart Unity.

If I don't restart Unity and continue to log events (which still don't show) then restart Unity later the events start to show up but stop short of showing them all after a while. If I restart Unity over and over eventually it catches up with all the events that have been logged. But as soon as I clear them the cycle starts again!

I'm currently only logging GameStart, LevelStart, LevelComplete, LevelFail, GameOver consistently with 6 test levels, and occasionally TutorialStart, TutorialSkip and TutorialComplete and a few custom events.

I wanted to check if this was a common issue or should I raise a ticket?