Bluetooth speakers work on some webpages not others
Weirdest thing: Bluetooth speakers show as connected under "settings." youtube, itunes play through bluetooth speakers as expected, but one page (HBO Now) plays through internal speakers instead (cannot get to play through bluetooth at all), without my having changed a single setting. from the same laptop, if I have both HBO Now playing and a song on iTunes, one comes out through one set of speakers, the other through the other! And it's not just Safari. Same on another browser.
MacBook Pro with Retina display, macOS Sierra (10.12.6)