Well the Jonas Brothers finally explained absolutely ... NOTHING about why the band is dunzo during a bizarre GMA interview this morning.
Nick Jonas came closest to breaking down their issues when he acknowledged, "We've had some complications in the group for a long time, without addressing them."
Nick seemed to be talking about disagreements over music -- but it's hard to say for sure since he was so damn evasive!
As we've told you ... Joe Jonas was spotted around Hollywood with a well-known addiction specialist days after the guys pulled the plug on their concert tour. Joe and his bros never addressed that -- though to be fair ... GMA never asked.
Watch the clip Jonas fans ... maybe you can figure out what the hell really happened.