When I tried to lock a MiG-25 at 55000 feet, Mach 2.5, I could see it on DDD and TID, but I couldn't lock it and go into PD STT mode.
Also tried with the PD supersearch. when supersearch is not activated, DDD can show return normally. When activate the supersearch and move the gate to the return, the return will just disappear ,after release the trigger, the return will show back again.
SS is done with 4 bars at same altitude.
Aspect is set to NOSE correctly.
Not able to switch to PDSTT / PSTT from TWS in this situation even at closer range , but use PS can get a PSTT lock @about 45NM.