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After exhausting everything to my knowledge, I reached out to HP. They had me run a 'force drop detection' test. Even though the test plots showed good coverage, #4 showed 234 nozzles out. I'm waiting for the new print head and hopefully that solves it.

After some searching I ran into this: Color intensity varies If some printhead nozzles are in use while others in the same printhead are not, water evaporates slowly from the ink in the unused nozzles, making the color more intense. Thus, in such cases you may notice variations in color...

Anyone seen this? I've worked through everything I know and searched for answers, but no luck. I've cleaned the print heads and ran test plots, which showed all nozzles are firing. I did substrate advance calibration and print head alignment, still nothing. The inconsistency print is always...