Session count clears at wrong time

I’m trying out the session count for the first time, so this may be my fault, but still. I set the session count to 23:59 just to make sure it’s the right time and not midday, which was a feat by itself because when I added the minutes, the hours cleared back to 00:xx. I got that done, though, yay me!
At 11:55 today, my session count got cleared automatically in the middle of my writing sprint. I have no idea why, so I guess this is a bug? Maybe I’m not using the feature right, who knows!

PS: My time zone is UTC+1, not sure if that matters in any way.

My workaround has been to set it to never reset automatically, then manually reset it at the beginning of each day.