Problem with the FuG-220 (german WW2 radar)

Since last update the FuG-220 on my Bf-110 G4 is no more of use.
Before planes in range were showed like a thick arcs on the radar screen, now i see no marks on the radar, only green light and something indistinguishable moving in the base of the cone.
Somebody can help me how to use the radar or i’ts a bug and needs a report?

Don’t know if this will fix the problem, but make your radar square.

Tried, but nothing.

Alright, maybe submit a bug report if it’s a problem, though the FuG-220 only works at high alt

An interesting video i found on YouTube: