Well spotted, LluÃs Massanet . I didn't notice the different conversion domain; it looks like we do indeed need to update the template to fully support the Hotel Price Ads tag.
In the meantime, can you try adding this into the template after line 67?:
g.google_conversion_domain = "www.googletraveladservices.com/travel/clk";
Let me know if that works. If you're not comfortable editing the template, let me know, and I'll log into your account and edit it for you.
Check out our new Swift integration library for iOS, macOS, tvOS and watchOS: https://github.com/Tealium/tealium-swift with updated