Slow loading into/leaving games

I wasn't sure if I should post this here or in "Client Discussion," so sorry if this is in the wrong place.

For quite a while now, the post-game lobby has taken longer to load than it should. It's nothing like the 2-3 minute delays other users have complained about it the past, but waiting ~30 seconds with a reasonably high-end machine feels a bit...well, bad. As a streamer who's just starting out, I'd like to mention my stream after each game - something I can't do when everyone is gone by the time the lobby loads on my end.

Lately, too, my game has been starting a few seconds late. This isn't game-breaking by any means, but after a lengthy loading screen, my game typically stalls for 7 seconds before everyone appears on screen at once. Has anyone else been experiencing these issues? Is this an issue on the game's part, or is there something I can do on my end to make a smoother transition between client, loading screen, and game?