Thanks @Srikumar @Gaurav thanks for the guidance, I will have to go though this in details during the Eid break to find out the root cause, starting with the oil. I don't think its a burnt clutch. It has done only 70K KMs, so that should not be a factor. It seems there is no issue affecting the on road behaviour or shifting. It does not also improve if i pump the clutch multiple times either before shifting.
Feels like it is directly related to the temperature inside so which again point to the quality of oil as Gaurav mentioned. I will start with the same and see how it goes. TIA