Wad process consume WAN bandwidth

Hi all,

I have some times "Wad" process who is consuming 100% of my WAN, I think it's like this daemon continue downloading something but there is no traffic on LAN side (like a regular download)

Running "diag test applicatio wad 99" instantly free bandwith

I'm running 5.2.8 on a 100D, I don't use explicit poxy

Found nothing in release notes/known issues

Do you have same issue ?