EI Plinkup App clear device fails after first time use

When using the EI Developer app, (on iOS10), the ‘clear device’ works just after startup of the app. The next time we try to clear a device (without restarting the app, nothing is send (no blinks). Killing and opening the app again makes it work again…

Yep, this is a known issue, see https://electricimp.com/docs/troubleshooting/knownissues/

We are very shortly going to be releasing an update which addresses it - it’s been in QA this week.