I don't think it's a big deal, because sometimes I do the same thing as you guys, and so far there haven't been any warnings or blocks on our accounts. But it would be better to use two different devices.
There won’t be any issues if you’re losing or if your winnings are small. Problems arise when you start winning large amounts. At that point, bookies will review your account, and if they find anything that doesn’t adhere to their regulations, that’s when the trouble begins.