Build: 3135 Mode: Creative Mode: Single Player Reproducibility: Always Severity: Minor Type: Oxygen Summary: Thin blocks on SVs and HVs, including doors and shutters, do not let O2 penetrate to their interior regions Description: All SV/HV blocks appear to be fully airtight. This means that if you are standing in an oxygenated room against a thin wall or an inside door, you will suffocate. I don't know if it was always like this and I never noticed, or if this was a bug introduced with the CV/BA 1/4 block O2 fixes in 3134. I am filing this bug report just to verify and log it as a concern. Steps to Reproduce: Stand next to a thin wall or inside door in an HV/SV with an oxygenated interior and notice that there is no O2 present. The attached SV is a simple functional example of this that can be placed in space for evaluation (demonstrates thin blocks, manual doors, and shutter doors).