I managed to replicate the 'radar bug'. Unfortunately.
I waited for about 2 minutes after missile impact, but it was still visible (in various radar ranges).
Could you please insert "X" and "C" screens also?
(and check page 30 of the manual?)
All Doppler radars are sensitive for low tangential velocity.
1. When the target angular velocity drops, the “RAZRES FM” (Switch on FM) red warning light (2) will illuminate.