Just tried this and...
confirm, preenabled torpedos continue pinging... I also think I seen snake torpedo circling, but it was only once and in next few launches they behaved as set (snaked or circled as should), once torpedo ignored enable order and continued straight....
So in fact different strange things are happening with torps and for sure preenabled torpedos are pinging... I'm not sure how I should comment this...
I have no idea now what could it be, could be something in doctrine language interpreter, but maybe something completly different... Well in fact torpedos are NOT homing when preenabled so they are preenabled only still pinging and that would mean not doctrine related bug, but snake <--> circle and similar things look like doctrine related... anyway... it's just sad...
