Yeah, that's what I did so far, too! Looking up the Grid on the map, while keeping the target's course and alt in mind - but the success was limited, as I said
Additionally, I've found the target info from ground crew to be completely useless - it always says the same... judging by the dev's modus operandi so far, I assume they've just hard-coded some lines in and hope that nobody will notice!
How long does it usually take for bugged-out planes to reappear?
Edit: Tested again and I can confirm that but now... A juicy target (Bf110) just disappeared at some distance, and I just couldn't find it again
However, at least some people don't seem to be bothered by this - a Bf109 (human) tracked me for some time, as he proceeded to shoot me down...
Maybe there is some method to solve this? Like it worked with the tree LoD issue, with some setting needing to be changed (and possibly re-changed) - but I got no idea which setting, or even settingS that might be