Hello Syed,
weird, weird. For me, with the same settings, works without any problem in both SAPgui/webui. However, in your WebUI screenshots I have noticed a difference in layout. In our system, the service request looks like this. Please, could compare the view location:
Did you change anything in the process typ 1003 customizing (blocking)?
Do you have full authorization?
What CRM version do you use - EhP and SPS?
Regards,
Dawood.