Transfer External Caller and ID T48G

[cornfuzed]

Hello,
We are using T48g's in our offices with firmware 35.80.0.70 and the issue is this:

External Caller calls Internal Caller A which shows the Caller ID of external caller.
Caller A transfer call to Caller B
Caller B only sees Caller A id and never the External Caller ID.

On Firmware 35.73.0.50:

External -> Caller A sees External ID -> Transfer -> Caller B sees External ID

Only issue is that sometimes blind transfer does not work between phones on firmware 35.73.0.50.

If two phones have different firmware:
Caller A: 35.80.0.70
Caller B: 35.73.0.50
Caller ID will not be displayed for External ID. Same issue as if all phones were same firmware.

Trust RPID and PAI on asterisk have no bearing on this issue from my testing.