A note from our manufacturers: "HP recently upgrade firmware on many new printers. We have tested every batch of Apex chip on all printers in the market. We are glad to inform you that all current Apex chip for HP 932xl/933xl, 950xl/951xl, 970xl/971xl work well on all firmware. "
A reminder for everyone using the generic line to avoid updating their printer's firmware. This will not affect the performance of the printer, but allows you to keep using your generic cartridges without issue.