I have the same problem about false hashrate.

Skein, advertise 14,19 GH/s but :
- suprnova : hashrate at around 12GH and 20% invalide share, those invalid shares show in Baikal UI too
- mining pool hub : hashrate average on 1 H between 11GH and 12GH, 12% invalid share on mining pool Dashboard and 0% invalid on baikal UI


Myr Groest : exactly same problem on suprnova (Verge).


I ll do more tests.

Nota : tests done with at least 5 x G28 unit at the same time