Yes. So what is the value of $foo? Did you print it? Is the loop necessary for the bug to happen, or does the error happen with the hardcoded value for $foo as well?
From the URL you sent to me, it seems that WWW::Mechanize returns absolute URLs, while WWW::Mechanize::Chrome returns whatever URLs are contained in the file. Simple printing of the values can confirm that to you.
Until WWW::Mechanize::Chrome achieves API parity with WWW::Mechanize in that part, consider converting the URL to absolute yourself.
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