In my save, the on_research_finish event does not fire. I have a few mods, but it doesn't work even after disabling them all. Of note is the auto-research mod, which would normally trigger starting the next research, but no longer works with the event not being triggered.

To narrow the problem down ...

log file: https://pastebin.com/QJC3BWiC

Not realizing I could simply use "game.print", I tried preserving the player's personal print function to be used in an event handler, like so:

/c local print=game.player.print script.on_event(defines.events.on_player_crafted_item, function() print("hello") end)

It could be any event, presumably ...

Wooden Boxes are burnable too.

Useful for getting rid of some of the early base infrastructure.