You don't need to explain the difference between STT and TWS, please.
In these cases I've already decreased the azimuth and limited to a 2 bar or 1 bar elevation. As soon as the target is dropped, the radar immediately picks it back up again (after I have to move the tdc and change the elevation back to where it was), so the target did not disappear from the radar's search pattern. The target can be flying straight and level, inside 30nm, and TWS drops them within a predictable interval of time, every time. It's an unannounced change in behavior with one of the recent patches. If it is an intended change I will gladly listen and adjust.