Suggestion:
During one or two updates, the ability to hear a sound ping, was removed.
Maybe it was intentional, maybe not (bug), however, it can be quite annoying, especially, if you’re doing other stuff and waiting for a match.
You can easily miss it, or get kicked out of battle, especially, if you had your game minimized.
To fix this issue, either add a missing ‘ping sound’, when the match is found, or just add an Announcer sound that says: “Prepare for battle!”