When used with C2ME, the doorway teleports player to the coordinates corresponding to where he enter the portal, instead of the prison structure.
Steps to reproduce:

1. Put down prison doorway and enter in survival mode.

I tried disabling all options in C2ME, but the bug still exists.

Possibly fixed in the latest release, there's a config option related to C2ME. Try and see if it works out of the box now, and if it doesn't, switch that new option off 🤔

Seems fixed in 1.20.1!