Stuck gauntlet in Labyrinth

Was doing the Cruel labyrinth today, in the room after the first Apirant's Trial I found a puzzle where you defend an object on a track. Well, when it reached the first corner, it got stuck, wouldn't move. If I was out of the AoE, it didn't move as expected, but when I moved into the AoE (or stayed in the AoE) it didn't move even though the monsters spawned.



tldr: Escort puzzle in today's Cruel Labyrinth got stuck while monster spawning continued until I killed them all. Being in AoE had same effect as being out of AoE thus making the puzzle impossible to complete.