Hey @Nithin, how do you print, usb-cable directly from pc or wifi directly by luban or sending file to the touchscreen/printing from touchscreen? Maybe a slow pc or a huge backup load could cause this problem.
On what print surface do you print?- is it possible that the ground is not strong enough and your model wobbles while your travels?- Which print and travel speeds did you run?
Last but not least, i would suggest you to calibrate your extruder,- maybe you are simply underextruding on this lines.
Where sits your filament-spool?- It is most important to let the extruder pull less as possible, no edges and so on. If you run with the original spoolholder i would suggest you to print a new one, there are several on thingiverse for the snapmaker 2.