When using a teleporter in your condo without a permission prompt, the player camera passing through the teleporter activates it and teleports the player.
Stand in front of a teleporter in first-person looking away from it. Scroll out to a third-person camera and when your camera passes through the teleporter behind you, you will be teleported.
The camera distance stops increasing once colliding with the teleporter.
The camera passes through the teleporter and activates it, teleporting the player.
I discovered this because my teleporters that go to destinations that have a returning teleporter behind the destination location (two-way door/tunnel setups) no longer worked with a third-person camera because the camera would activate the returning door behind you, sending you back to your original location. I believe I first saw this in 0.15.0.0 or 0.15.0.1 but hadn’t narrowed down what was causing it yet.