Oh, seems it’s support email from SONOFF customer service, i will forward this topic to them to check because i’m from eWeLink team and haven’t access right to SONOFF support center.
Let’s back to the issue, we have learned and tracking the random ON/OFF issue for a long time, and it’s really a complicate one, router, ISP, timer setting, Alexa routines, chips, firmware etc., every aspect may cause the abnormal actions.
And we have a discuss topic here and collecting feedback from users with testing firmware, a massive-release firmware version 3.7.3 has been pushed this Monday, far from i can tell, i think it’s the same issue with others in the topic below, and i suggest you to update your devices to the latest firmware 3.7.3 and let me know if the issue is fixed.