Why yodle when practiced lightly ?

Rangon

Age 30. Im baritone(i think so). While practicing arpeggio if im a bit loud i reach A4 after that it starts to become airy, BUT if i practice with less volume or lightly the voice flips like a switch, it yodles at the very start i cant even go pass A#3. WHATS MY PROBLEM ?

Wigs

Sounds to me like you are negotiating your secundo passagio, which is when your voice transitions from your chest voice to your head voice. The yodel is common and it's important to keep practicing this until you can do it without the yodel.

Rangon

Thanks a lot for the answer.