Looks like I am also encountering this HW issue. I got 5 bangle.js 2 from the Kickstarter, and the one I ended up using cannot connect via BT anymore and also doesn't show up as DfuTarg when in the bootloader mode.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Looks like I am also encountering this HW issue. I got 5 bangle.js 2 from the Kickstarter, and the one I ended up using cannot connect via BT anymore and also doesn't show up as DfuTarg when in the bootloader mode.