x4522 multicast double packet

[indy99]

"program" joining 4 multicast port, getting data. running as "onload -p latency ./program"
run "program" //ok
run same "program" while running first //ok (same multicast address)
close second "program"
first "program" reporting multicast UDP packets are double
run again second "program" while running first : no UDP double packet, everything OK
again close second "program" then first program starting reporting double packet again

this problem on X4522, x3522 has no problem
version: onload-9.1.0.24

[boyracer2014]

Do you use the latest firmware ?

[indy99]

Yes, I updated last firmware. Old and new firmware nothing changed.