Replays cause sound to stop working

[Random Reference #98]

I've had this happen a few times now where I choose the option to view a replay I saved after a match and the sound just cuts out completely until I restart the game. May have something to do with the player music after a match or possibly an issue with bluetooth headphones and this game.

[Simo62bit]

try to follow this guide, it might help:
https://support.rocketleague.com/hc/en-us/articles/360021854713-Why-is-there-no-sound-or-distorted-sound-in-Rocket-League-
now I don't have the opportunity to see if the problem is encountered with me as well, but I can assure you that errors like this could happen with unofficially supported devices, such as in your case headphones that use bluethoot technology.
if this happens since the last update, it would be advisable to report the problem to support, so that if it is found as a bug, it will be fixed as soon as possible:
https://support.rocketleague.com/hc/en-us/articles/360015694413-I-Want-to-Report-a-Bug-or-Glitch