Time lag between Exchange Time and System Time from v5 relese

Hi .. In two different instance of AWS i am running instance1 with V 4.2.0 and instance2 with V5(Latest kite connect). I am observing time lag in the latest version of kite connect. I doubt have you introduced any queue concept in websocket? After the heavy computation in the "def on_ticks(ws,ticks):" method connection is not dropping and in the next tick i am getting the next old tick data.

But i did not observe any time lag in V4.2.0.(Here connection is dropping after the computation and re connecting it again.)
What code changes i need to do in V5 to run my code perfectly with exchange time.and fetch olny the latest ticks.

this is my below code:
def on_ticks(ws,ticks):
for tick in ticks:
#Doing some heavy computation of the data for further purpose
#......
ET=tick.get("exchange_timestamp")
logging.debug('ET => '+str(ET))
dnow = datetime.datetime.now().strftime('%H%M%S')
logging.debug('CurrentTime => '+str(dnow))

def on_connect(ws, response):
ws.subscribe(FandOInstrumentsSubscribe)
ws.set_mode(ws.MODE_FULL,FandOInstrumentsSubscribe)
def on_close(ws, code, reason):
# On connection close stop the main loop
# Reconnection will not happen after executing `ws.stop()`
ws.stop()

kws.on_ticks = on_ticks
kws.on_connect = on_connect
#kws.on_error = on_error
kws.connect()
kws.on_close = on_close