I`m using sniffdog for last couple of days mining skein and from time to time notice strange decrease in hashrate. This image perfectly illustrates the problem, it has started 4 hours ago and still persists. All this time my sniffdog miner shows straight 4.7Gh/s at 5x 1080 ti, while website only sees 1.3Gh/s.

Can anyone confirm having this too? I only found posts regarding high reject value, but nothing regarding my case.