UUGear have made us aware of a bug in the V1.03 (ID=0x23) version of the Witty Pi software which may cause the device to lose response after being woken up by a start-up alarm.
Whilst ongoing stock deliveries won't have these issues, any orders from our initial stock delivery may have the original V1.03 software with this bug.
A new version of the software has been released to resolve this issue (V1.04, ID=0x24) along with a document describing how to identify your version number and upgrade the firmware.
Please download this document for guidance on how to check and upgrade your Witty Pi 3 Rev2 software.