Subnautica 2 Bugs & Known Issues

1. Remove all attached interior modules (lockers, fabricators) and exterior modules (solar panels, transmitters) first. 2. Pick up dropped items inside the base — they can block deconstruction. 3. Use Shrink Mode to reduce the structure size before deleting. 4. Reload the save to clear physics-clipped items. 5. Last resort: use Settings → Refund Bases.

1. Restart the game. 2. Verify game files (Steam → right-click game → Properties → Verify integrity). 3. Update GPU drivers — but if on AMD, roll back to Adrenalin 26.3.1. 4. Clear Steam download cache (Settings → Downloads → Clear). 5. Disable overlays (Discord, MSI Afterburner) and add the game folder to antivirus exclusions. 6. Check for the latest official hotfix.

1. Make sure all players are on the same patch — version mismatches break joining. 2. Restart the game; then restart the device. 3. Switch hosts to the player with the most stable connection. 4. Restart your router; avoid mobile hotspots.

No widespread save-corruption issue confirmed in EA, but the Refund Bases feature can lose items. Recommended: copy `%LOCALAPPDATA%\Subnautica2\Saved\SaveGames\` to a backup folder regularly. Steam/Xbox cloud conflict on patch days can overwrite saves — check cloud version history before reloading.

Caused by interacting with a black box before NoA prompts you to. Can softlock progression. 1. Reload an older save from before you touched the black box (most reliable). 2. Uncheck the quest tracker to let other objectives update. 3. Continue exploring nearby areas; trigger may unblock. 4. Wait for NoA dialogue to fully play out before interacting. 5. Scan nearby objects in the Old Habitat to trigger missed flags. No official fix yet.

Patched. Previously you could throw and drop an item at the same time to dupe. Hotfixes blocked the reliable version. Some users report partial residual cases — not consistent enough to rely on.

1. **Disconnected from Session** — random multiplayer disconnects; restart game / check connection. 2. **Multiplayer Not Working** — can't join sessions; see fix below. 3. **Error on Startup / Crashing on Startup** — corrupted files or AMD driver issue; see fix below. 4. **Cannot Deconstruct** — base pieces won't remove; see fix below. 5. **Wu Wu Lianghai Bug** — black box softlock; see fix below. 6. **Duplication Glitch** — patched in hotfixes; mostly non-functional now (some report partial residue). 7. **Teleportation glitches** — fixed in Hotfix 2. 8. **Infinite oxygen after dying of hunger/thirst inside Tadpole** — fixed in Hotfix 2. 9. **Late-game multiplayer crashes** — fixed in Hotfix 2. 10. **AMD DirectX 12 crash on startup** — error popup improved in Hotfix 1; roll back AMD driver to Adrenalin 26.3.1 as workaround. 11. **Hammerheads following players home** — reduced attraction to Tadpole lights in Hotfix 2. 12. **Ping feature crash** — fixed in Hotfix 1.