This has come up several times before. It's not well cited. I read through it myself and even if the math is right, the application of the math seems incorrect.

The original data was a small number of studies with a small amount of old (1980s?) data that found a slope with so-so correlation.

The revised math finds a much smaller slope with what appears to be much worse fit to the same old data. The data was nearly horizontal before, but after the math changes it's much further away from 0.

The original study was making predictions near the data. The revision is doing massive extrapolation, far away from the range of what any of the studies tested.

I'm not a statistician, but it's not surprising to me that it's being ignored.