Problem fixed in 1.78, laser and guided shells are working correctly, at least in the editor :)
Dec 29 2017
Jul 17 2017
Jun 11 2017
Jun 6 2017
Problem still present in 1.70. Seems like only the new jets are not affected.
Before 1.70 the laser shell was "working": was locking on any vehicle in the splash area, also without laser, as the guided shell was doing.
In 1.70 laser shell and guided shell are acting like normal shells.
Oct 13 2016
May 10 2016
Same issue here, also jets suffer from same problem, version 1.54 .
In addition "stereo variation" is delayed sometimes also for some seconds.
E.g. if i turn the head when engine is going off i can hear in the left ear what i should hear with the right one, so you can't understand from where the sound is coming.