Maybe I'm not quite right, but it seems to me that RWR (not vector) works somehow "randomly", that is, under approximately the same counteraction conditions, the lights always burn or never (and the sound notification always works).
1. Try to replace the section with this one
[RWR]
Type=RWR
NodeName=RWR
//NodeName=RWR_front
If it works, you can try adding the tool:
Instrument[093]=RWR2
[RWR2]
Type=RWR
NodeName=RWR
//NodeName=RWR_front
2. Download and install this (of course, making a backup).
https://combatace.com/files/file/9472-working-hawk-for-sf2/
Fly and attack in different conditions on the MiG 21 and 23
Draw your own conclusions :)
I saw this problem but for now I left everything "as is".
Maybe someone more experienced here can help.
Fuel indication MiG 23s (by analogy with MiG 29)
Perhaps the indicator "residual xx kg (50%)" is more correct.
For example:
"Остаток 1500кг"
I don't have specific information )