One of the front speakers will cut out when listening on AUX

[RaffOutRowd]

So one of the two front speakers will cut out occasionally while playing music through the auxiliary port (headphone jack). I.e. if I change the "Balance" setting to "L5" when the left speaker isn't playing or "R5" when the isn't playing I can't hear anything. They have yet to both cut out at the same time. It used to only be the right speaker but the left one has done it a couple time too.

Strangely enough pressing the RPT button will fix it, sometimes... Pressing that button has also made the sound cut out entirely once. I thought the repeat button only worked on CDs.

Switching to AM-FM while this is happening still works, but when I switch back to AUX I still won't hear one of the speakers.

I thought it was maybe my phone, but it happened with my girlfriend's phone too. I even bought a new cable.

Any ideas?

This is the Bose system, no nav.

TLDR: Left or Right speaker will cut out on AUX only. Tried new cable. Tried other phone. RPT button sometimes fixes it