Hey guys,
This is a known issue we are currently working on fixing. The problem comes down to adding new Layers.
When new layers are created (either by you or by an XREF import or something else), they might still not have a state saved for existing Layer Combinations. As a result, when ARCHICAD checks which combination is active, it sees that the settings are not a 100% match, and considers the current state to be "custom".
We are working on a fix that (if everything goes well) goes out in a later update of ARCHICAD 21 (70xx), and AC22 Beta 4. Until then, you should be able to fix this, by applying the "faulty" layer combination in the Layer settings dialog, changing the visibility of any layer on and off, and then pressing the "Update" button. This should update the Layer Combination with a proper setting for each Layer, so the problem should be gone.
Regards,
Daniel Alexander Kovacs
Professional Services Consultant
GRAPHISOFT
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