Paging and intercom not respecting busy phones

FreePBX distro 5.211.65-1
Asterisk 11.8.1

I have paging group defined in paging and intercom. It’s set to “skip” for “Busy Extensions” however the users are complaining that if someone pages the group anyone on the phone gets interrupted by the page.

anyone know if this is a known issue or why this may be happening?

btw, all phones are either Digium D40 or Digium D70 phones.

SOLVED: Changing the “conf room app” setting to “app_conference” seems to have fixed the problem.