The bug

Some mobs don't properly interact with the new crimson/warped doors:

• Villagers/vindicators can't open the crimson/warped doors like they normally do to other doors.
• Zombies/vindicators can't break crimson/warped doors, like they normally do to other doors in sieges and raids.

Notes: For personal testing of this issue, replace all existing doors in a village with the crimson/warped doors and observe how villagers, vindicators and zombie behave.

Results

• Villagers are stuck inside/outside of their own houses.
• Vindicators are unable to break/open these doors, during a raid.
• Zombies with the CanBreakDoors tag are unable to break/open these doors.

Code Analysis

Code analysis by SPGoding can be found in this comment