Google speaker will not say 'back door' - possible censorship?

I have a weird issue if I try to get my google speaker to say ‘back door is opened’ it remains quiet, any other message that doesn’t have the words ‘back door’ at the beginning works .e.g ‘Garden door is open’ works. I’m wondering if this is some kind of censorship because of the possible minor sexual connotations.

Could somebody test it out on their setup to confirm that I am not going mad?

Relevant yaml snippet is below

service: google_assistant_sdk.send_text_command
data:
  command: broadcast 'Back Door is open'