Diagnostic failure for recipe_pcrglobwb.yml on v2.11.0rc1

[chrisbillowsMO]

Describe the bug

This recipe is failing as noted in:

• Recipe test results for ESMValCore v2.11.0rc1 #2421

Please attach

• The recipe that you are trying to run, you can find a copy in the run directory in the output directory
• The main_log_debug.txt file, this can also be found in the run directory in the output directory

[valeriupredoi]

iris.exceptions.ConcatenateError: failed to concatenate into a single cube.
  Cube metadata differs for phenomenon: precipitation_flux

Very possible this is a manifestation of the same issue with new iris' Attributes as @schlunma pointed out in the other issue