Hi Hemanth
Here all is fine (sunny finally outside)
My SAP webdispatcher is version 742, patch 27 and running on a server in the DMZ.
The PI version is: 7.11 sp13 with kernel 7.21
I think the PI is still sending its serverheader although the parameter on the webdispatcher is set to FALSE as on the PI it has neiter False nor TRUE but a 1.
Looking at the both notes you provided and the one 1616535 I gave in the message I am going to test it with the ICM value on the PI server set to FALSE.