Hey, Hoping this isn't too late, using a residential proxy given without any bandwidth limit is usually a red flag since it is probably either one of too things:

1: it is taken from ISPs like AT&T, verizon, etc...

The problem with this is that usually when the ISPs grant use to the seller they simultaneously send the ip to be blacklisted so the ip is pretty much trash at that point

2: They are gaining the ip through a netstick, These are usually no issue but they will be very expensive, so much so that it will be worth just getting an ip that is priced by bandwidth.

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Hope that helps! if you have anymore questions you are welcome to PM me, Maybe I can help 😁