I am not sure if this is best described as a bona fide bug, but I have noticed repeatable glitchy behaviour on the 'Calendar Event' insert under signals.
Note that I have created a calendar event and set the date and time,

When I either hit enter or select another menu, it appears as if the setting for the time has not taken, as per below,

However, when I reselect the menu in question, the time setting has, in actual fact, been retained (as per below),

Only now, when I either hit enter or click elsewhere, is the time change displayed (as per below),

Essentially, I am having to reclick on the same menu twice in order to get the time setting to display on the minimised 'start:' menu.
I know this is not the biggest deal in the world (by a long way), but thought you might want to know. I have not uploaded a log as there was no crash and I presume any logs will be historic. If you would like me to repeat the above steps and upload the logs, I will happily do so.
It is repeatable.
Andy