I have two RMS1's and use them occasionally. Before the last update, they performed flawlessly in Battle Mode Free-for-All. Today, both S1's appear to be firing their IR guns correctly, but only one is registering any hits. In other words, one is "invulnerable" during an IR gun match. Also, but probably unrelated, the armor sensors appear to be working fine with the gel beads.

Any thoughts or suggestions would greatly be appreciated.

maybe one of your IR gun is not functioning, or maybe one of the IR receiver from the gimbal is not working.