Hello, I haven't noticed a problem with the PSD importer until now.
When making a folder using the [merge] tag, if I have layers inside that folder using the effect for lights 'sum/additive' (Aditivo in Spine Spanish), those layers lose the effect, and Spine converts my layers into layers with no effects making changes in the final result. Here is a sample:
How my drawing looks in the original file:
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How it looks after using the import PSD option:

As you can see, the final result lost the light effects and only kept the alpha level of the layers, making the effect almost invisible. My folder content is:
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And the layers with problems are:
- l2 (alpha 5%)
- l1 (alpha 16%)