I said vendor here but it’s more like banks we work with. So there’s someone responsible for the technical side of banking relationships.

But yeah it’s kinda a zone where most weekends there’s no problems so it’s not a huge priority… until it is

somehow having a contact at a bank who works on the weekend is more difficult to believe than a random vendor

I don't know what exactly GP works on, but 'bank' covers a lot of ground and some things happen on weekends. 'Open Banking' APIs, and some payment rails for example.