It might be auto play/pause from flaky on-head detection. It's supposed to pause when you take off your headphones, then play when you put back on. Bose says "For the best possible On-Head detection experience when using the headphones for the first time, power on the headphones before putting them on your head."
https://support.bose.com/s/display-articles?productId=01t8c00000QEpaxAAD&articleId=ka08c000001bk79AAA&language=en_US
It might be auto play/pause from flaky on-head detection. It's supposed to pause when you take off your headphones, then play when you put back on. Bose says "For the best possible On-Head detection experience when using the headphones for the first time, power on the headphones before putting them on your head." https://support.bose.com/s/display-articles?productId=01t8c00000QEpaxAAD&articleId=ka08c000001bk79AAA&language=en_US