Understand that bugs often have to be replicated by the quality assurance team to verify the bug. Also in the bug report forum, Blizzard typically does not respond, unless they are actively investigating a confirmed bug but need specific information from the users (this policy is elaborated in further detail here). Furthermore, when it comes to consoles, functions like voice chat is not only subject to issues that can occur in Overwatch, but also with the hardware and operating system of the console platform.
If you have not already, go to this support article, click the option for console platforms, and try working through some starting troubleshooting steps.