Historical missions have supersonic targets (habu, F-14) so these can be aquired fine. "How about lock by IADS, then brake the lock and reaquire?" and weirdly, it made everything fine! I locked by IADS, unlocked and manual mode suddenly works. You can lose and then aquire it fine in manual after using IADS. But before using IADS, target is simply invisible. (IADS is not changing beam's direction even for a degree. It's just make target suddenly appear, without changing any parameter on SAM).

Asuluk training ground.

Practice target:
LA-17 simulating F-86 Sabre

S-200VE Vega-E


00:00, Practice target LA-17 simulating F-86 Sabre launched

+++++++++++++++++
00:00:12, SNR ON AIR


Total, SNR On Air Time: 17sec