Interesting discussion,
I had one rear go darn close to flat when snow blowing.
Fortunately I had a can of air to inflate enough to get home where I kind of over inflated to continue.
That was 2 years ago and that tire never lost pressure since.
Tire is tubbed and filled with beet juice, might the juice plugged the hole?
Still wonder to this day if I have an actual puncture.
I speculate that perhaps a loose binder might have 'flicked' the valve to allow air out, that or slime did a plugging job.
Notice I took the 'let well enough alone' approach and simply monitor pressure from time to time.
That's going on 100 hours or so.
Fingers crossed.
Repairing a punctured slime filled tire is no simple chore, basically a job for professionals!