This bug ticket duplicates this:
https://forums.playdeadlock.com/threads/doorman-out-of-bounds-ceiling-teleport-exploit.123111/
Initially missed this one
We can abuse edges of doorway to get out of bounds
1. Place one portal at any wall
2. Other on any wall close to ceiling
3. Jump and dash into top frame of the portal
4. And now you teleported out of bounds!