Was lvling up my pokemon (Golem) agaisnt a gym leader, and i found that when golem leveled up, and then get 1 shot immedietly after, it's sturdy ability would activate, even though it didn't actually have max hp anymore (because the max hp would increase with the lvl up), this would leave my golem on 0 hp but not fainted, the waiting message would then appear and soft lock my game, on one of the 3 times this has happened to me i was still able to access chat, but not exit the battle. This has happened 3 times to me so far (ive havent been playing long), but everytime this setup has occurred it has softlocked me.

Thanks for the report. We have a ticket up internally regarding how if you level up it shows you as less than full HP but at the same time thinks you do have full HP. I believe this confusion to be the cause of the soft locking battles when mixed with Sturdy, so I've passed this on to there.