Quick answer
If an Explorer shakes or gets stuck on the red magnetic spiral floor, check the game update first. PC patch 1.1.2 specifically includes a fix for that floor issue.
An invisible wall is a different symptom
An invisible collision in the Gravitonics Department is not automatically the same bug as the red-floor problem. Do not assume the floor patch fixes every obstacle in the area.
Recover a blocked session
- Return to the main menu.
- Choose change → start new journey.
- Let the host choose the nearest checkpoint from your saved progress.
- Confirm the selection and restart that section together.
Check whether both players can now cross the blocked point and interact with the machinery. Expect to repeat actions that were not saved.
A locked mechanism, with normal movement
If the characters move normally but a door stays locked, check the puzzle instead of repeatedly reloading. Use the ring and control guide to identify symbols, levers and gravity directions.
If the collision persists, report the platform, exact build, checkpoint, shaking versus invisible-wall behavior, and what each player was doing to official support.