Why does my speaker stop playing?

My UE2 is updated, charged, paired, and has great sound quality. My issue is that it just stops playing with the power on. I have had Apple trouble shoot my iPhone and iPad… nothing wrong. When I play music on my phone or pad, no problem. As soon as I attach it to the speaker, it plays for a few minutes, then stops. It’s frustrating because I have had this speaker for a few years and love it! Then this started maybe 6 months ago. Logitech has had me unpair and pair to both devices and reset several times! HELP!!!