Terminal Signal Issues - any tips or tricks?

Not submitting this as support as such, because Its only consistently happening to one outlet, but they’re just constantly having their terminal go offline, I’ve already swapped it out for a new one, I’ve tried SIM, WiFi only, WiFi and SIM but WiFi connected, and it just seems once a week I’m getting this call.

I’m beginning to wonder if they’re in some sort of Faraday cage!

Anyone had this before? I don’t get it with others, or at least they don’t tell me - it’s hard to even “support” it as such because all I can really say is to reboot it.

Let me know if you’ve had similar, perhaps environmental causes etc?

Cheers!