Well this sucks.

I got a tip regarding such cases recently.

Dodge roll towards the door, exit to character selection while You are mid-animation, log back in and dodge roll into the room.

May take few tries, but worked for me on several occasion.

Make a frost wall, skill gem or have one on hand. Hopefully on keyboard and mouse stand against door and use it at your feet you can then just walk through the door. I use this as a way to bypass alchemy labs not working.

Revive from the last checkpoint in guessing if that doesn't help, tp back and then walk of shame from the start of your snake

Sometimes waypoints can bug out and you can warp into an unexplored room. And sometimes you can activate ones in adjacent rooms. No guarantees, but it's worth a try.

I'm still there, can't face closing the temple without locks😭

I logged this as a bug before https://www.pathofexile.com/forum/view-thread/3909836 but also https://www.pathofexile.com/forum/view-thread/3907294

I got locked inside a room once. Teleported out of the instance, reentered and ran back, room was open.

You'll need a few air runes and a few law runes and You'll be able to telegrab them easy peasey🤓