I've purchased a bunch of cheap sensors from AliExpress also. Half of them had serious issues. Firmware issues that would knock them off my gateway, or drain

I've purchased a bunch of cheap sensors from AliExpress also. Half of them had serious issues. Firmware issues that would knock them off my gateway, or drain their battery completely so I'd have to go change them. And not so fatal issues like the battery that came with them was total junk and couldn't sustain a device for more than a week. When I spent 2x as much from a US vendor from Amazon, they worked. No messing around. Probably they are built in the same regions, but US designs by US vendors I've had much much better luck with. I don't buy lots of things from Amazon for fear of fakes. When you're on niche products that nobody cares to duplicate it's much safer. It's almost comical the supply chain understanding you have to have to make sure you get the right thing.