Possibly? The D50 has an intercom softkey you access via the contacts page. You get three options:
voicemail, intercom and monitor.
This. But as I said, it’s really not a big deal, I’m just curious I guess about why it doesn’t work with FollowMe enabled. Because if I use the intercom module to setup an intercom rapid dial THAT works with FollowMe enabled. And the intercom softkey works so long as FollowMe is not enabled. 
Anyway - this really isn’t important, so let’s not lose any sleep over it!!