Server list loading/refresh problem

Hi, i got a big problem, expecially with Modded and Community servers, if I start Rust , 88 official server will “fast show up” , then modded and community server start growing up veeeery slowly (like 1 server every 10 seconds)
If i hit refresh list, the 88 official servers will load up as usual but then community and modded server will be 0, not even finding one server…
any hint?

i just port forwarded ALL my router ports (since i can’t put dmz) 1-65535 to my static IP, but nothing changed, tried to lower Steam in app server download (default is 5000, tried 250 but nothing changes)
I dont understand why official shows up and community or modded wont, it has no sense O_O

Thanks in advice