Gabriel, they don't actually respond/reply/email you unless they need more information.
In fact, when they do need more information, they do contact you. I have had that situation and they can tell me the complete record of the reports I have submitted on a particular incident. Once they get a 'fix' for an issue, it gets rolled out to a patch.
They do acknowledge that your error report has been submitted when you submit it. I don't think getting another email or a personalized response is the best use of time.
Just keep submitting... they aren't ignored for sure.
Now if anyone from esri wants to dispute my assertion… step in