Avionix PingRx ADSB receiver not working after 4.1.1 upgrade

I have an Avionix Ping Rx Adsb receiver connected through Serial4.
It was working well with AC 4.0.x, but after the upgrade to AC4.1.1 it doesnt work anymore. Mavlink Inspector shows no longer any ADSB messages.
SERIAL4_PROTOCOL is set to 1 (Mavlink1 as with AC 4.0.7)
ADSB_TYPE is set to 1

My parameter file is attached. Any ideas are welcome.
ParamAC411_01122021_Flow_TX2_ObAvm9n.param (18.8 KB)