[CLIENT] Game Lobby freeze / failure to load

I will include a screenshot/gif recording next time I get this bug (sorry I didn't think to do it before).

I have encountered this bug 3 times over the past few days since the mega patch (7.22).

I'll get the screen to accept a match, I choose "accept", and then during the loading animations (where each player is named off individually and showing the lane they'll get), the client just glitches either before or right after the first player is named for their lane. I'll continue hearing the rest of the standard sounds, so I know that the lobby is proceeding as usual, but my client's visuals are all either frozen on a single frame or quickly changing between a few animation frames.

Once the animation series is over, I can move my cursor around and it will change from the static cursor image to the "clickable" cursor image, and I can click things on the client and hear that small sound effect indicating that something has been clicked.

I can also click the chat box in the lower left, and type a message. When I hit 'return' to send the message, I will hear the small audio confirmation that my message was sent/posted to the lobby.

In all cases, I've had to kill my client and restart, nothing seems to "unfreeze" this bug.

It's also interesting to note that these bugs have occurred with my first accepted match following log-in. Once I kill the client, restart, load a custom game, and then drop to go queue a normal game, I don't have the problem any more. I suppose I'll just have to test it each time using a custom game for the foreseeable future.

I am playing on a MacBook Pro, OS v.10.13.1