I seem to remember the wood that self combusted was cedar, and there was also some moisture involved.
We had a thread about this once before but it’s been deleted, as well as the nitwit that started it. Unfortunately there was some good information in there as well.
We use 42 gallon trash bags on our dust collectors and fill up 3-4 a week. It all goes in the dumpster. Since we use a variety of woods, there’s really no other option.
Artisan Woodworks of Texas- www.awwtx.com