BLF re-park

[joegilmr]

Hi,
Using T27G phones (FW 69.84.0.15 HW 69.0.0.0.0.0.0) and VitalPBX (Asterisk). I am having the re-park on BLF hang up issue. It is repeatable and consistent.

Pickup call (lift handset)
Place call in park using BLF
Place handset down.
Lift handset
Pickup call from park
Select the SAME BLF park button
Call is dropped

If you do not pick up the handset or put the handset down between parking then it's OK.
If you use park on a different park bay or manually transfer to park bay or group, then is OK. I should note that there is a very short high pitched squeak as the call ends on the other end.

Any help is appreciated.

Joe