Derived Coordinate promoted `Cube`: has coordinate system in PP loading but not NetCDF loading

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
20/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
python
Domain
data

Research direction

Start by locating the PP loading and NetCDF loading entry points and compare how a derived coordinate is promoted to a Cube. The issue points to David Bentley's 22nd October internal message-board post for the missing reproduction details. Done means the coordinate system behavior is consistent between both loading paths, with a reproducible test or example.

Written by the indexing model from the issue text.

Description

Type: Bug

This is terrible practice but I'm already over an hour into this and I don't have enough time left to create a MRE.

As a substitute, please see @david-bentley's post from 22nd Oct on the UK Met Office internal message board.

Dominant language
Python
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Forks
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Avg merge
3d 20h
Merged PRs (30d)
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