Dear Renjith,
I noticed that your sample is working fine from my side.
I cannot give you a piece of my code, because of complexity of my codes.
I'm trying to reproduce the error but no luck.
I have my own workaround for this problem, by setting SfGrid AllowResizing="false" and GridColumn Autofit="true".
I think that I make mistake somewhere in my codes, anyway ... thank you for your sample & support.
Regards,
Handi Rusli