This was added in the last update
"Added a privacy setting in the UI so that players can specify whether they want to allow external 3rd party websites to be able to access their match history (defaulted to private)."
so you should go to your settings in Dota 2 and enable it
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first time i have like this, valve saved game (weaver) and dotabuff doesnt.. still the same for 30 minutes, i dont think it is dealyed or something