My new Argon running Device OS v0.9.0 enters immediately listening mode (flashing blue) on boot or reset with buttons released. Buttons are not broken, it reacts on both in different cases.
particle usb stop-listening works. The device connects to WiFi and mesh network and successfully starts the loaded user code, for example Tinker works properly.
Current installation is result of
particle flash --serial argon-ncp-firmware-0.0.5-ota.bin particle flash --usb hybrid-0.9.0-argon.bin
FTR Xenon loaded with its 0.9.0 works properly, on boot connects to Mesh network and starts the loaded program.