PSA: the BTG Audio angled 3.5m TRS plug that comes with Starlight cable is a 100% deal breaker when used on the Onkyo DP-X1. Any slight rotating movement make it unplug by itself. 45degree rotation angle is enough to get from Left photo to Right photo where you'll notice the music paused with headphone icon notification gone.
What this means is you just can't use this cable at all for a portable usage. Your music will pause and you'd have to constantly push it back in. Mind you this is less than 1mm sliding upwards that causes this.
So while I'm waiting for my Norne Therium balanced cables with the 2.5mm TRRS Eidolic spacious barrel to arrive, I'm using the Noble stock cable that came with the Savant and use it on my Empire Zeus ciems. This works flawlessly, and stays firmly attached to the DP-X1. I can rotate its plug all I want and make wide cable movements the music won't pause.
I've tried the BTG Starlight angled plug on the Sony ZX2 and there's no issue. It's not sliding out. I don't know why this is happening with the DP-X1. Anyways, I've disliked the BTG Starlight from start so it's just a strike-3-you're-out! event for me.