According to your testing, does the issue occur with ONLY Immersive Portals mod installed?

Yes

Forge Version

40.2.0

ImmersivePortals Version

1.4.16 (1.18.2) Custom Jar provided by Nick1st

Latest Log

N/A

Crash Report (if applicable)

N/A

Steps to Reproduce

1. Install Tinkers' Construct, Mantle, and Immersive Portals
2. Start up Instance
3. Choose Stacked Dimensions in World Creation Screen
4. Travel to space above the Nether dimension and mine down using a Tconstruct Pickaxe (I used Manyullyn)
5. Jump into mined area and you will receive suffocation damage
6. Try mining with a vanilla pickaxe (I used Netherite) and the suffucation damage does not occur

What You Expected

I would expect that both pickaxes would function identically and mine blocks according to both client and server

What Happened Instead

I suffocated.

Additional Details

No response

Please Read and Confirm The Following

• I have confirmed this bug can be replicated without the use of Optifine.
• I have confirmed the details provided in this report are concise as possible and does not contained vague information (ie. Versions are properly recorded, answers to questions are clear).
• I have confirmed this does not happen on the fabric version (If it does please report to here instead).
• I have confirmed I'm not using a hybrid server (Magma, Cauldron) or a different (non official) Forge Server release.
• I have confirmed this issue is unique and has not been reported already.