FreePBX 17.0.21.7. If a user has follow me on, when a call is transferred to them, it will not show the external caller’s ID. It will show the internal extension of who transferred them for the whole call. Toggle FM/FM off and the ID shows up. Change external CallerID in FM/FE is set to default. Seems like a bug.
Physical phone or soft phone? I remember solving this on a Yealink by enabling Remote Party ID