Ignore guides telling you to expand the range on the scrubbers. They have become MUCH more powerful since the auxmos update and easily overpower inflowing gas resulting in runaway fires that then manage to overwhelm the scrubbers.
It’s worth noting that there is still one persistent “bug” that even this won’t guarantee to help (but it will still be better)
If the server is overloaded to the point of excessive lag, atmos will cease to process and properly mix/flow. Unfortunately when that happens, the SM does not stop and will continue adding gas to its own tile that doesn’t flow out of it. There’s been a proposal to hook the SM into atmos and pause it if atmos isn’t processing.
That said, this isn’t always what has been causing the SM to bug out - if using an RCD under the SM to remove and replace the floor helps, then atmos isn’t paused and the guide still applies. If using an RCD doesn’t help and the SM immediately reignites after replacing the floor, atmos is paused and there is legitimately nothing you can do right now.
Fairly certain you can somewhat get around it by putting a vent under the SM and using scrubbers on the dreaded expanded range option.
And if anything else fails, spacing the SM will give a good delay to the delam and drastically decrease the resulting boom.
I personally witnessed this fail, and that’s actually what got me looking into the issue. I was observing, expecting them to RCD under the tile and replace the floor… and they did, but it immediately re-ignited after replacing it. They followed up by doing the vent trick and it also failed. After this point they gave up.
To be fair, I was running my CO2 Supermatter setup as seen here. It might just require that the scrubbers are maxed out to not catch fire.
Also, in the attempt to save it, I think that the others there might have actually been making it worse.
Someone kept changing my filter settings so we were losing the Pluoxium, someone set the vents back to external 101 kPa instead of internal 0 kPa, and the scrubbers were set back to the default scrubbing settings instead of siphoning.
Eventually I got it stabilized by turning off the CO2, setting it back to Nitrogen, and dumping more canisters of Nitrogen into it. Then once it was stable, I just set it back to the way I do it in the guide and it was fine for the rest of the shift.
If your SM suddenly starts delamming for no reason with nothing in the entire setup being touched >1h into the round for seemingly no reason, you should just aHelp to get the SM replaced to solve this issue. Nothing you will do will stave off the inevitable boom.
I’ve had this issue before, and I blanketed the entire space between engi and AI sat in radiators, injected N2 continuously from atmos, and nothing had any effect on the SM resetting itself to being 4000K hot and on fire with 90% O2 every SM tick.