I used to get internet problem while mining too. I was using ethOS at that time. The tx/rx were very high, the whole internet of my home went down, froze. I was hacked. The only solution then is to reimage my ethos ssd, restart modem, router, switch. Then the internet is back to normal. You seem having the same problem. Try to clear virus on your ssd or reimage it.
Lol It's not a virus. I started having this problem with 3 rigs on SimpleMining. Last night I switched them to PiMP, same issue. I'm really hoping it's the switch & it seems to make sense that the high # of packets would cause this regardless of OS as each rig has 13 GPUs so I am submitting a larger number of shares.