This is something I've experienced which I'm absolutely certain is a bug or an unintended change. In games I've played against certain players, they will use a jumping tyrant then when fighting a human use jump attacks in the doorways, the tyrant doesn't reach the full arc of the jump of course, but still hits the ground for the damage like normal. This happened in Provance with the door across the bridge in the small bunker and the lower doorway next to the health station, not the health station under the bridge, the one in the lower building leading towards the big doorway.

I'm all for being able to use the jump indoors, but in the small doorways it's an instant burst of aoe damage and stun that is extremely hard to avoid.