Chat Blocks Fine Words or Phrases

When I try and use in-game chat on Java Realms it blocks silly things like "Trial Chambers". In the past it has also blocked things like "Want to do a phone call?" however I cannot recreate the latter.

 

Here's a screenshot for proof.

 

Steps to reproduce:

1. Join a Java Realm
2. 2. Use chat, it will happen eventually if you talk for long enough.