The chest room is impossible to pass without breaking the chest so you got 2 bush to mandatory destroy and then you get it . Then you are allowed to destroy 4 mroe bushes.
But in every pathway possible you got 5 to destroy. Unless you must evele up to unlock a swimining ability...
I am good at puzzle game, I have played solarus, this must be a problem on the dev end. I need to find a wayto save edit the chest HP and had 1. The file is readble via RPGmaker save edit.
I also read something about a monster. spawning in this room udner very specific conditions....