I'll send over the model for you to look at.
I did revisit the raw IES file and I think I might know where the issue is coming from.
Of the luminaires which were causing issues, there was an adjustment factor applied to the Candela Multiplier, so I've amended these back to 1 and they work fine now.
See below images of what works fine and what doesn't work.
I've labelled them good and bad, but really they're both fine. Applying a Candela Multiplier is very common for when a manufacturer has a suite of the same luminaire operating at different currents for various luminous fluxes. It's easier to apply a Candela Multipler than re-photometer the whole luminaire when you know that the photometric web will be relative with a higher intensity.
It may just be a translation error in the way that Enscape reads the info.
At least this fixed it but it may not be the entirety of the issue. I appreciate you looking into it.