Exchange has introduced a mechanism of Trade execution range where orders shall be matched and trades shall take place only if the trade price is within the reference price and execution range. https://www.nseindia.com/content/circulars/FAOP40075.pdf

Any incoming order, if it results in execution of a trade outside the reference price and execution range, then such an order (full or partial as the case may be) shall be automatically cancelled by the Exchange.

Due to above, both first leg market order or second leg stop loss limit order of a derivative cover order can get rejected by the Exchange