I’ve only noticed it with Mithril tools.
If you use a mithril gathering axe tool on a Petrified log in Ember Bay you gain ruined ore chunks and unbound magic.
Which shouldn’t be a thing since unbound magic from nodes can only be gathered by unbound gathering tools.
If anyone else can recreate this issue please post/comment as well
Tools/Petrified Wood bug
There is no bug, gathering unbound magic is intended to happen no matter which gathering axe is used.
The orichalcum axe and unlimited tools also give you unbound magic from pretrified logs. The unbound axe will give you an extra bit of unbound magic, in fact, you’ll get unbound magic from all normal tree nodes if you’re using it.