Not for Chopan bypass but because of slack.
Even after slack it has never reached KTES 1 hr before.
If it happen due to chopan bypass then train reaches 1 hr before at Singrauli not at nkj... This is due to slack... And it happens regularly
Even with reversal itself@cpu it sometimes arrives SGRL 1 hr early . Slack timings starts right from CPU till JBP. Speedup required in WCR zone especially.