Thanks for reporting this! The store is currently experiencing degradation. As a result, there may be a delay or error in the processing of orders and in-game purchases. I'll keep you updated as I learn more.
Thanks for sharing this! Is Rainbow 6 the only game you're experiencing sound issues with? If so, I'd recommend verifying your game files and restarting. If that does not work, please reach out to support for more help - https://support.ubi.com/en-US/Games/2559
Sorry to hear you're experiencing crashes during gameplay! Are either of you getting a specific error code? Also, please submit a ticket to support so we can look into this further - https://support.ubi.com/en-US/Games/2559