Issue with Patrol Duration

Hello,  
my Patrol duration is set to 600 seconds.
and it seems, timer doesnt reset after Patrol is destroyed

heres an example
22:11:08  player spawns a signal patrol
22:14:44  player destroy that patrol
thas ok 
later on

22:20:33 another player thrown a signal and a patrol is spawned
perfect
but exactly 600 seconds laters

22:21:08  [SimplePatrolSignal] [DEBUG] Destroying Patrol Helicopter.

22:21:08  [SimplePatrolSignal] The patrol helicopter is leaving the area.
 

the second Patrols get destroyed by the plugin, by the first patrol signal timer


can you fix that?

thanks