A wisteria tree grew from a sapling that i planted next to my tree chopping contraption from "create mod". One log replaced a windmill bearing. I also lost two windmill sails nearby.

expected behavior:
Blocks other than leaves (by tag) and "replaceable" blocks (method on block class) should not be destroyed. There can be more exceptions (plant parts mostly) but killing a windmill bearing is a no-no.

mc was 1.16.5, not sure about your mod, i no longer have that hard drive.

what version of minecraft did this happen on, and what version of the mod were you using?

Should be fixed as of 1.18 or 1.19