and using a regen-bomb to regenreate the world is also treat like a “change” so that its a full 4hr after using bombs to regen the terrain before it will put resources in rather than just however many seconds of having walked away.
natural regen of blocks is not a “change” though so doesnt cause any pause of course and resources will get put in straight after a natural full regen of the chunk
This does mean that using a regen bomb “might” not make it faster to regen resources…
eg if you have just dug out the ground, then using a regen bomb will make it “slightly” faster as when regen kicks in, it doesnt have any work to do and can do resources straight away. But, if you wander over to a chunk that was “about” to fully regen naturally, and decide to use a regen bomb to finish it off… you will kick in a fresh 4hr timer and have just made the resource regen take longer to begin than it would have 