I didn't switch the radar on manually at any stage when i was trailing Grizz. Radar will try to aquire the target if the EOS cannot maintain the lock anymore. The last time i lost the lock completely, Grizzly reported a lock warning on the RWR, and at that time my HUD displayed only the EOS search image, with absolutely no sign of radar beeing active.
Edit: Just reviewed the tracks, and at time 12:09:38 you can see me loosing EOS lock, and Grizzlys RWR is giving a lock warning. That's pretty much all that was meant to be in these tracks. At that time, Grizzly pulls throttle back to idle, which makes me loose the lock, but for some reason, my radar locks him up momentarily, but doesn't give me any indication of what's happening. All other spikes in the track can be disregarded.