Light banding on solids - UCJV330

[Goatshaver]

I'm getting some light banding in this background I'm printing. I saw it on another print that had an orange solid area. Seems to be with certain colors cause I didn't see it in some lighter blue prints I did a coupe weeks ago.
I've checked my feed comp and adjusted it and my drop position before the print. Normal speed seems to help and it's still there but less noticeable.

Any suggestions?

 

[Dasdesignguy]

What does your test print look like?

 

[Goatshaver]

What does your test print look like?

From what my tech said is that solids are challenging at this rate it's going to take 21hrs of printing for this job.