Spawned my KABB into a 2.3 RB. Was full overcast and I spawned in complete cloud. Shortly after spawning I could hear a plane approaching, so I climbed out of the clouds and found he was directly on my tail.
This has happened in the past. There has been a recurring issue where planes in clouds create a sort of “fuzzy” look on some machines that makes them see you from across the entire map, allowing enemy aircraft to attack you even though they are completely invisible to you. Apparently it’s back again.