Particle continuously loops trying to connect: "Event loop error 21"

Troubleshooting
5 
const system_tick_t TIME_PER_SECOND = 1000;
const system_tick_t TIME_PER_MINUTE = TIME_PER_SECOND * 60;
...
static const system_tick_t IN_PROGRESS_TIMEOUT = 5 * TIME_PER_MINUTE;
static const system_tick_t COMPELTE_TIMEOUT = 10 * TIME_PER_SECOND;

The timeout that is always triggered is the IN_PROGRESS_TIMEOUT, as per this that I posted a while ago: How to notify application incase of an incoming OTA update? - #37 by damonmaria

So it's waited 5 minutes before sending the spark/device/session/end event. But I see what you're saying / that's made me think: sending the spark/device/session/end event may be causing the session to be broken during the processing of that same event? Which causes the error response. Because even tho every Particle.publish("spark/device/session/end", PRIVATE | WITH_ACK) returns false it does in fact work (the next connect after reboot has to do a full handshake and correctly pulls down the firmware).

So maybe the solution to my problem is to remove the WITH_ACK. It's not the end of the world if that event is lost.

Thanks for the heads up. I'll definitely rearrange things.

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