Vested amount not shown correctly

[infinity0]

https://polkadot.polkastats.io/account/16iZ5JgtXmH7kedwxbbPwvzMXYtRUgwmiwiALSkWLZY8eFR

Today on 2020-12-29 at block height ~3109000 it says Total Balance | 7.1000 kDOT / Vested Balance | 104.5129 DOT

I am not sure how this is being calculated, however if you query the chain vesting.vesting($accId) e.g. via polkadot-js you get:

{
  locked: 7.1000 kDOT,
  perBlock: 1.3508 mDOT,
  startingBlock: 2,047,000
}

From this we calculate (3109000 - 2047000) * 0.00013508 = 143.45 as the vested balance, not 104.5 as stated by polkastats.