We have heard that Epson uses firmware as a new tactic to render Auto-Reset Chips (ARC) third-party cartridges useless!
Typically, firmware is used to fix and update minor issues on the printer software. This hasn't been 100% confirmed, but we still recommend to SWAY AWAY FROM ANY FIRMWARE UPDATES
if you plan on using Refillable Cartridges or a CISS until more information comes in!
Please read this article, based on the European market, for more information:http://www.wasteink.co.uk/epson-firmware-update-compatible-problem/
Thank you Don D. for the information!