Finally Zerodha acknowledged there was fault with PI.
Nithin said in z-connect,
"We have put back the old installer on Q, uninstall the current version of Pi and install the previous one. In the current version we have done data compression, which is causing delay in price ticking for a few. We will have this fixed asap."
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Thanks to them.
I have reported the problem there 1 day earlier in their blog(previous day: Thurs day 12th).
Earliest Acknowledgement of the such problem and sending a SMS through terminal can do a great help to traders.
Happy Trading.
H.C.