Symptom:
[share line] when resume the call, the phone show "private"  bubble

Conditions:
Phone: 9-4-1MN-71
CUCM: 10.0.0.7021-10 or 9.1.2.10000-12
step 1 configure phone A with number: 90001, 90002.  Privacy: on
          configure phone B with number: 90003, 90002.  privacy: on
          configure phone C with number: 90004
Step 2 C call share line(90002), A answer. then A press hold, resume the call.
         phone B will show "Private" Session bubble.   but when you change to primary line, then return to the share line, the "private" Session bubble will disappear.