Why is SL AMO stopped in Zerodha?

I used to place SL-M in AMO which was very convenient now it is asking me to place GTT but in GTT I can’t place SL-M and by placing SL- Limit order, when there is a sudden movement, it doesn’t get triggered and I am losing additional points. ANy solution to bring back SL-M? or try to get SL-M in GTT