Annnd.. the tweet shows the exact product used.
It's now showing as sold out on shopee.com (maybe it was before though, who knows?)
I run a smart home blog (smarthomepoint.com) and it's surprising how many people email me saying that their Ring cameras randomly stopped recording, and right before someone walked past and pointed a 'phone like device' at their camera.
It'd be interesting to know just how pervasive WiFi jammers are.
I suspect it's a bigger problem than is advertised in the media.