My core has been behaving odd. It has been good yesterday flashing the same code after the deep update.
Today I did some minor tweak, did the usual thing and flashed the Spark core. After the rapid flashing magenta (completing firmware flash), instead of going back to blinking cyan attempting to reconnect to the network, the LED turns to “breathing blue”, and then only after a few seconds it will then go into “breathing cyan”. However after that, the firmware is not running.
I experimented by resetting the core, reconnect to the network, then flashed the “Tinker app”. After the rapid magenta flashes, the same behaviour is observed.
I have tried rewriting the firmware through DFU and the behaviour is the same.
Thanks for your assistance!