Description :

When root placers are used with straight trunk placers, fancy trunk placers or forking trunk placers, dirt generates below the trunk and above root placers can replace the bottom of the trunk.

The attached zip file is a datapack that contains three tree features with the affected trunk placers and roots combination.

How to reproduce :

Create a tree feature that uses a root placer and a 1x1 trunk placer other than upwards branching.

Additionally use an above root placer to see it replace the bottom log of the trunk. (EDIT : above root placers can also replace branching logs on forking and fancy trees)

Expected behavior :

The provided root block should generate below the trunk of the tree instead of the provided dirt block.

Above root placers should not replace the bottom log of the trunk.