Converting "Java Block" to "Geckolib Animated Model" in Blockbench breaks model UVs

[byteManiak]

Hi. I'm trying to convert a Java block model to a Geckolib model in Blockbench. The model itself looks fine, however the face UVs are all oriented towards the same direction, which breaks texturing.

The original block looks like this:

And after the conversion it looks like this:

I tried manually editing the per-UV "rotation" property in the .bbmodel file, but that didn't change anything.