AMPBench fail in URLs with UTF-8

[mobiliodevelopment]

Hello there!

In Webmaster Central recently user come with strange issue on his AMP and i've seen that AMPBench tool fail spectacular on that site.

His link is:
https://blog.mrcodenevis.org/%DA%86%D8%B1%DA%A9-%D8%AE%D8%B4%DA%A9-%DA%A9%D9%86-%D9%82%D9%88%DB%8C-%D8%A8%D8%B1%D8%A7%DB%8C-%D8%B9%D9%81%D9%88%D9%86%D8%AA-%D8%AF%D9%86%D8%AF%D8%A7%D9%86/amp/

And when it's placed in AMPBench link become:
https://blog.mrcodenevis.org/%2525DA%252586%2525D8%2525B1%2525DA%2525A9-%2525D8%2525AE%2525D8%2525B4%2525DA%2525A9-%2525DA%2525A9%2525D9%252586-%2525D9%252582%2525D9%252588%2525DB%25258C-%2525D8%2525A8%2525D8%2525B1%2525D8%2525A7%2525DB%25258C-%2525D8%2525B9%2525D9%252581%2525D9%252588%2525D9%252586%2525D8%2525AA-%2525D8%2525AF%2525D9%252586%2525D8%2525AF%2525D8%2525A7%2525D9%252586/amp/

Each %25 become %2525 and as result it's 404.

But clicking on "Desktop" button link become:
https://blog.mrcodenevis.org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amp/

And with few more clicks link is become:
https://blog.mrcodenevis.org/%2525252525252525DA%252525252525252586%2525252525252525D8%2525252525252525B1%2525252525252525DA%2525252525252525A9-%2525252525252525D8%2525252525252525AE%2525252525252525D8%2525252525252525B4%2525252525252525DA%2525252525252525A9-%2525252525252525DA%2525252525252525A9%2525252525252525D9%252525252525252586-%2525252525252525D9%252525252525252582%2525252525252525D9%252525252525252588%2525252525252525DB%25252525252525258C-%2525252525252525D8%2525252525252525A8%2525252525252525D8%2525252525252525B1%2525252525252525D8%2525252525252525A7%2525252525252525DB%25252525252525258C-%2525252525252525D8%2525252525252525B9%2525252525252525D9%252525252525252581%2525252525252525D9%252525252525252588%2525252525252525D9%252525252525252586%2525252525252525D8%2525252525252525AA-%2525252525252525D8%2525252525252525AF%2525252525252525D9%252525252525252586%2525252525252525D8%2525252525252525AF%2525252525252525D8%2525252525252525A7%2525252525252525D9%252525252525252586/amp/

Link to original posts in Webmaster Central:
https://productforums.google.com/forum/#!topic/webmasters/myW7ZX9q3Ys