Why did my HAB explode? ... (The second time ...)

https://www.youtube.com/shorts/N1HL9pJJy2Q

So I just recently returned to this game after a couple of years off. I know there are a lot of new and changed game mechanics that weren't there when last I played in ~2023, but I've been slowly working it all out.

However, during today's stream I ended up blowing out my HAB ... twice! The first time was semi-deliberate and completely explainable due to my use of an unmonitored Gas Mixer. But after repairing and rebuilding the system (and adding a logic gate to shut off the gas mixer), it exploded again.

This time I don't believe it was the gas mixer, but the gas mixer, all of the internal piping and all the logic circuits were destroyed in the chain reaction along with both pressure and back pressure regulators. The portable AC (although turned off, unpowered and with no coolant slotted) was also obliterated, and the inner walls of the airlock appeared to be imploded.

As far as the coolant canister for the AC, that was slotted in a crate outside the HAB and could not have impacted the catalyst for the explosion.

If it will let me, I will post a link to the save file, just before the second explosion occurred:

https://drive.google.com/file/d/1ZnAJmYwsvXL4RXLNx0pItLivXr1mK8aV/view?usp=drive_link

If it matters, I modified my world-settings file to increase mining yields (for streaming) and I also set the orbit timescale setting to 0.0001171933 in the console, increasing day-night cycle from 20 minutes to 60 minutes (because I thought I could handle the challenge ...)