CAM diagnostics variable CCN2 through CCN7 has zero / undefined values in the lowest model layers

[oyvindseland]

Please provide a clear and concise description of what the bug is.
The CAM 3d diagnostic output variables CCN2 CCN3 CCN4 CCN5 CCN6 CCN7 has close to zero or zero values in the lowest part of the atmosphere such that
CCN1 is fine, CCNX is missing the X-1 lowest layers of the output.

• NorESM version: noresm2_5_alpha07
• HPC platform: Betzy
• Compiler (if applicable):
• Compset (if applicable):
• Resolution (if applicable):
• Error message (if applicable):

To Reproduce
Steps to reproduce the behavior:
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Expected behavior
The variable values should more or less continuously decrease from the surface and upwards.

Additional context
I have not traced the error backwards through the versions.
The error is not seen in the underlying fields, e.g. aerosol number concentration so likely only related to the output