Has the skein hashrate just gone down a lot for anybody else?

My hashrate has almost halved since yesterday according to the TBF 'My Workers' page.

The Alexis78 skein miner reports the same hashrate as before (around 550 MH/s for my GTX 1070), but on TBF's site it's only listed as around 300MH/s after 12 hours of continous mining.

Also saw that the pools total hashrate seems to have almost halved since yesterday as well, as seen in the top right corner on https://dgb-skein.theblocksfactory.com/.