Clouds stop ir locks?

Ok so all you have to do to not get hit by SARH missile is stay low now Aim-9L’s wont lock when people go into clouds… I was less than 1 km from Mig- 23 on his afterburner and wasnt possible to lock seems pretty dumb to me. The clouds where a bad Idea they dont make people climb because you dont put the fog on the deck where it belongs so instead its just a big buff to everyone flying low

Clouds absorb and emit tons of IR radiation in real life. It makes complete sense they would do the same in game.

Yea but its not happening on lesser missiles I can use my seeker from Aim-9J to search for unspotted targets 3 /4 km out with my F-5E but 9L wont ???