I've noted a similar discrepancy in hashrate, and not just on Lyra2v2. Many times it seems like the dials on the pool dashboard are only displaying a fraction of what the miner is actually doing.

For instance right now, I have my rig running tpruvot ccminer v2.2.3 at 28MH/s. There are shares being submitted a couple of times a minute all in this ballpark. But the dial on the dashboard is saying that I am only getting 2MH/s for some reason, which is obviously well below what it should be.

The hashrates are displayed correctly on the worker configuration page, with my big miner currently showing 25.8 MH/s on the worker config versus the 28 MH shown in the miner console. I've been mining since dogecoin back in 2013, and am used to there being some slippage between what the miner says and what the pool reports.