Anybody else being bothered with purple rain just now as we are having a horrendous time with it.
Chances are it's a Gulfstream with its position not being decoded correctly.
Next time it happens, look in your Network Flights for a GLF4 or GLF5. Even if you can't find one, try turning off the network temporarily as there may be one lurking anonymously with a blank ICAO type code or the dreaded 3 dots.