I have a Sony RM-X4S connected to my Z130BT.

When I first connected the RM-X4S, it worked just fine. Track forward moved to the next track, track backward moved to the previous track, volume up/down did what they were supposed to, ATT and the source buttons did what they were supposed to.

Recently, I reset my Z130BT (holding the buttons during boot to perform a reset) and I also disconnected the harness to remove all power to the unit (as part of the reset).

After doing all of this, the RM-X4S now works erratically. Some of the button functions (like track forward and back) have become reversed and sometimes even placed on completely different buttons. It's erratic too. Some days the RM-X4S works perfectly fine and other days it does that thing where the buttons are all mixed up.

I've checked to make sure none of the wires are pinched or shorted and made sure the RM-X4S is fully plugged into the wired remote plug on the back of the Z130BT.

Anyone have any ideas / fixes for this issue?