I tried to plug in to the speaker undocked, it works alright unless i keep moving my handheld around, i think maybe its cable issue?

However if I plug in to speaker when docked it buzz all the way

headphone via 3.5 works flawlessly in handheld though

I tried google to find solutions on this however the weird thing is I cant seem to find a lot of result via google regarding external speaker with swtich, does most ppl play switch via handheld or TV only?