The USD 120,000 tournament sprang to life when 16h seed Shubhakar Dey packed off second seed Ajay Jayaram 21-19 21-17 and then 12th seed Zulfadli Zulkiffli of Malaysia accounted for top seed Kashyap 21-16 21-12.
While the top two seeds struggled, third seed RMV Guru Sai Dutt and fourth seed Anand Pawar did put up a fight but suffered a similar fate.
Later in the day, 11th seed B Sai Praneeth rallied after losing the first game to get the better of Guru Sai Dutt 15-21 21-9 21-16 to advance to the quarterfinals.
He will now face Thailand Grand Prix Gold champion and sixth seed K Srikanth in the quarterfinals. Srikanth had to save four match points in the second game and then went on to waste four in the decider before getting the better of 14th seed Arvind Bhat 19-21 23-21 24-22 in an hour and 11 minutes.
Joining her in the last eight were, second seed P V Sindhu and Arundhati Pantawane. Sindhu defeated Sabrina Jaquet of Switzerland 21-19 21-5 in the pre-quarterfinals while Arundhati got the better of Thailand's Natcha Saengchote 21-13 21-11.