yep ..... I have the same question.
several weeks ago, I find this problem with lyra2v2.
so I test hashrate report from Ahashpool with my 1080ti ring, maybe over 10 hours.
finally,the pool's hashrate is 40~60% of my ccminer report.
damn it, it's terrible.

I report this to support@ahashpool.com
and then
no any reply to me !!!

so ... I take all my rings to leave Ahashpool.