Because it appears everyone is saying FD/Trap should be instant. The only way it was ever instant was using the PetPassiveMode() script. Show me a clip from after this patch in 2006 where a trap is placed in the same keypress.
Here is a clip of how its supposed to work.
https://www.youtube.com/watch?v=U-BQ_JIcJV4
Notice how he manually stops pet from attacking, clicks FD, and clicks trap, in 3 keypresses. Never was it an instant cast.
Here is a clip of an instant trap exploiting petpassive, and that is the only reason fd/trap was ever instant cast pre bug fix.
https://www.youtube.com/watch?v=WEQd7Ycydy4
This thread should be titled - BUG - Feign Death not dropping combat quick enough. Because thats the only issue with FD atm, not dropping combat in the way vanish is combat bugged.