hashrate1D vs 1D Avg Hashrate

[eztvdpqx5]

I think I am misunderstanding hashrate1D from the backend as I noticed it differs from the 1D hashrate average the frontend calculates. I use hashrate1D for the average 1D hashrate on this chart. It currently says the 1D hashrate is 10.2PH/s, however in the last day you can see that hashrate line has all been just under 10PH/s, so not sure how the past day's average hasharate could be 10.2PH/s. The frontend is taking hashrate datapoints from the last day and getting 8.77PH/s which seems more accurate.

So it could be that I am just misunderstanding this metric from the backend