Ok, so i started the game today. Installed it, changed the controls to adapt them for my keyboard (nothing special, just the direction for azerty instead of qwerty.), and started a game. And my game was scrolling forever in the right direction, no way to return to the base portal. So i reseted controls, started a new game and same issue. Save and load changed nothing.
After quiting the game and started it again, the issue was gone.
It's totally possible it's some error i done, not a bug with the game, and all seems to works fine now. But just in case i post it here.
Start the game, create a new save, infinite scrolling to the right, issue gone after quit and restart. Not sure if not just human error.