Lighting Bug?

[coarse dew]

I'm having some lighting issues with my model. It appears fine in blockbench, but certain faces turn dark when implemented in minecraft, as you can see in the image. Any ideas what is going on? I can answer any questions to help figure this one out, but I've been stuck for the past few days trying to debug this.

[random cradle]

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[rapid ingot]

Yeah, ingame shading is weird sometimes.
Sometimes moving around the pivot points helps, sometimes you need to rotate the elements slightly (or by 90°) etc.
Don't know a surefire way to fix that for all angles either though

[coarse dew]

Changing the pivots do seem to fix some angles, but not all. I'd like to understand the cause better so I can fix all of them, so hopefully there's someone who's solved this issue before.