Just a quick update (since I haven’t checked the forum recently): we’ve communicated with Ed over support and it has been sorted out that this is due to a bug in the firmware, which trigger a buffer overflow problem when the amount of log data retrieved for display exceeds the buffer size (8KB). This doesn’t happen often because usually there isn’t that much log data, but if you have a large number of zones, and the app retrieves a whole week’s log data this can be triggered. We’ve already fixed this issue internally and will be testing it more comprehensively and release an update asap.
In the meantime, if you don’t view log (or if you use a script to view log on a day by day basis), the bug shouldn’t trigger.