exactly same issue with mine also ..!!
era irde2 new vehicle ...
left power window lags when pulling it up
@Arjit/Kavitha - what you face may or may not be a problem or defect. Something that can only be confirmed after checking. So get it checked by the ASC - and if you feel that the power window is rather slow then insist on getting it fixed.
For those who got the power windows factory fitted, get the power window regulators replaced under warranty. For those who got it either as an accessory or aftermarket, enquire with the person who did the install.
Second Rohit. Simple things first. Applying a coat of silicon based lubricant between the window glass travel-railing could solve the problem. ASC would do this first upon receipt of complaint. Silicon-Lube Spray Can for this purpose is available in car accessories shops. Use periodically to enhance Power window motors' life.