"Game in Progress" screen appears, but no in-game load screen (Now with glitchy Shen!)

Hi! I have been investigating a problem that has begun happening with the release of ranked TFT on this patch: That of the in-game loading screen never appearing. It appears that in order to get it to start appearing, I need to not only exit out of the client and log back in, but actually hit Ctrl+Alt+Del and close out of everything LoL-related (probably the in-game process itself is the key thing to restart manually like this) in order to get back in. Of course by the point I load back in the first few battles have already been lost, along with any item or gold drops from the first few minion waves, but I do my best and usually finish 7th-8th anyway.

Anyway, this last game I played, I got a weird bug when I got back in: Apparently I'd been assigned Shen in the opening carousel--he's the one champ I had when I got back in--but somehow after the first battle that I was able to see, there was an enemy Shen that remained on the board not doing anything. This enemy Shen that didn't do anything remained on my board for the rest of the game, including during planning phases. It was in the first row of hexes in the opposing side of the map, and I even saw an enemy unit spawn on top of it in one battle, but it never went away.