Logbook not logging

No doubt the logbook has some issues. I noticed one thing in testing the other day. First and only time I’ve had “zero” times logged.
The first “zero” time I got was logged at the time I turned Devmode on while already in a flight. The second “zero” time was when I activated the framerate view. And the third time was when I exited devmode, while still in flight.
I haven’t done enough testing to validate anything, but found it really strange that those three times all correlated to those actions. Even with devmode now turned off, it appears that even with just the framerate view on the screen, it didn’t want to log.
This is only one test point, so won’t jump to conclusions, but I’m going to try and test some more. Just hate having all those “zero” time log events.
Regards