Timer goes to some huge number if you are using DL at midnight
I think it is programed to remember the time you would end, but not the date. This is a problem and should be fixed
I've had no problems when crossing over midnight. In fact, I often use Duo from 11 pm - 1 am so I get 2 days added to my streak with 1 study session.
I had never had this problem before, but the timer went out to many places, and midnight is the only possible explanation i could think of. Maybe it was just chance and they happened to be changing the site at that time... I have no clue
It is a glitch that has been reported many times; nothing to do with midnight. It happens to me when I use an iPad, usually when I get an answer wrong.