Once again, welcome to the \textbf{Wanker Radar Experience}^{TM}. If I understand correctly, this is nothing that has not been in the game before, just that people were unaware of it, because only late Soviet radars had problems.
These are not ghost targets. In the game, TWS on first detection of a target finds its location, on the second detection it also finds its speed. So those are not ghost targets, those are just initial TWS tracks that have not yet been updated with the targets velocity vector.
Here, you first lock and break lock, this clears out your TWS screen. Then, the radar detects the targets, but those have only been detected once, so they do not yet have a velocity vector, which is why they are stationary. You the keep switching targets, which keeps moving the scan area and messes with the scan, not letting the radar spot the targets for the second time.
I have a theory that when a target gets too far from where the radar thinks it last was, the radar sometimes cannot update its location even if it scan over the target. I do not know to what extend this is true, or if it just a different issue that looks like it, but here is my old bug report on it:
https://community.gaijin.net/issues/p/warthunder/i/YCqxldyCZYa6
In your video on the bug report, you have a wide scan area that has a period of 4.3 seconds. Some of the targets have been picked up twice, so they have a velocity vector, some have been only once, so they appear stationary. Radars sometimes do not pick up / update a target even when they scan over it (could be the issue from the linked just above bug report). Couple the long scan time with the 8 seconds to clear targets, and you get stationary contacts that seem to be ghost targets.
Long story short, they are not ghost targets, they are just TWS contacts that have not been updated with a velocity vector. Although, I guess calling them ghost targets would not hurt if it helps fixing the issue.
Couple fixes I see:
- Fix the issue with targets sometimes not being updated even when they are scanned
- Increase scan speed / give modes with lower scan period
- IF HISTORICAL: make TWS find both velocity and position on first detection
- Increase the refresh time threshold for old contacts