Most likely this is a printer issue that can be solved with running a few built-in checks or cleanings. Before anything else, check your ink cartridges. This sounds too simple, yet many times we get so caught up in the technical aspects of a problem that we don’t start by addressing the basics. If there’s a fair amount of ink in each cartridge, next run a Nozzle Check.
If there are no gaps or staggered areas, then try a Head Cleaning; this can be found in the Utility window. If you aren’t sure what to look for when proofing a Nozzle Check or Head Cleaning Cycle, there are summaries and directions on what to look for when running these cycles within the pop-up panels for each function.