Yes, proper re-set of "AI knowsabout" on mission save/start could solve some other related AI issues/bugs too. IIRC its an old and resistant bug like the muzzle flash bug which appears sometimes/rarely after loading a mission....
Ondrej Spanel, BIS Lead Programmer
Iron Front: Liberation 1944 Beta Tester
Take On Helicopters: Rearmed Beta Tester
OMAC Mission Pack 1
Tactical Withdrawal mission for Iron Front Liberation 1944
A Mine In South Asia