I have noticed while going on my missions in Legends of Aethereus that while the loading screen starts up to load the next area, it will stay on that screen, and not go back to the game. I have found out that Alt Tabbing would make the loading screen go away, and i could continue to keep playing, but the desktop mouse cursor would be shown at the end of the in game cursor, and my controls would be all wonky. I found out that it’s having an issue with cinnamon, and my only way of playing it with no errors was to play it through a different Desktop environment. I just ended up installing LXDE. I love LXDE anyway.
If i do find a solution for the cinnamon issue, i will post it.