I don't recognise the Julia Middendorf name. Thought I would with CH that high... only Julia Middendorf I can find is a 22 year old with CH 347...
I suspect OER have got it wrong, as the 22-year old fits the profile of (perhaps) a college student who isn't playing on the tour so has dropped out of the rankings.
I tried searching for another Julia, but with no success.
I suspect that at some stage they've taken her junior ranking. It's been wrong since 2020 and adz1983 is the first to notice.