Whenever I break a tree, I get nothing from it. Could this bug be because I have the TreeFalling mod by rakambda? I assume that it is but I'd like to be sure.

+1 I also meet this problem.

Translate:
SNEAK_DISABLE disable mod when sneaking
SNEAK_ENABLE enable mod when sneaking
IGNORE always enable and ignore sneaking

Here is an workaround. Hold Shift to disable TreeFalling. then DynamicTrees can work well.

In config fallingtree.json .

{
  "sneakMode": "SNEAK_DISABLE",
}

Thank you, this helped out.

or add dynamic trees blocks to fallingtrees balcklist. then you can cut trees without holding shift.

Closing this issue since it's related to mod compatibility with something not really made to be used with DT (dynamic trees already fall when chopped) and it seems there's a fix regardless.