Interpolation error creating a delta chi2 = 20 on DESI likelihood

[vivianmiranda]

Hi @cmbant @JesusTorrado

In both CAMB and CLASS (older version of Cobaya - so I have not tested if this problem is absent on new versions). I was getting chi2 ~40 for DESI and horrible predictions on bin z = 1.4

Then I made this change (picture attached)

and chi2 drop to 20.

With the fix (random cosmology - see the z=1.49 prediction and DESI chi2):

Without the fix