The timer froze for me aswell (It remained at 36minutes for me at the very end)
And this isnt the first time that this happened to me, so the best thing you should do is problably to look up the time beforehand that Nutaku mentions in the game.

Anyway my princess won, got the 300 killstreak reward and I ended up in the top 1k. Great success


Edit: They also added a few new SR cards in the SR gacha. Its a good thing that I decided to keep my SR tickets a little longer.