Hello,
I have been playing on Stadia both with my laptop Using Trackpad and K (I know, painful). And on my Chromecast with the Stadia controller (I was using two different controllers, both worked fine). I have not had these issues. I made it past the prologue and up the beach fine (once I figured out how to play :D).
However, I did find a weird bug just after. I am new here, so I apologize if I am hijacking this thread. Mods feel free to move this post or lock me in a dungeon if I am indeed doing so.
Here is my issue...
Just after the beach, when you get to the gate and help them fight the goblins, I had multiple issues and had to reboot many times.
I had the battle not lock up, but I had no moves to make and could not end my turn and therefore either perish, or leave (I think I had defeated all my enemies).
So, I relaunched the game, and the entire HUD was all weird. I was zoomed out beneath the world, and it was all blue sky. I could see the world (Howl's Moving Castle Style, but not zoom in.
This was only on my Chromecast with the Stadia controller.
This oddity would happen any time I would load any of the three saves most recent.
A few exits later, loading a different save, and better gameplay (one in my party did die each other time), then all was fine.
~Leko