Using the deconstruction planner will make the bot go to the marked item and destroy it instead of returning it to the player. I'm 99% sure it didn't work like this before neither its the intended behaviour.

Also when this bug occurs, an error pops saying "Early construction robots must only be used with personal roboport equipment."

This message doesn't pop with trees, only player items, belts, inserters, etc.

I though it could be a mod conflict. Loaded up a new save with only this mod enabled and it still happened.

Thanks for notifying me. I'll look into it, and get back to you. It might have something to do with a recent update on experimental that breaks a ton of mods.

Thanks for the report, it was a quick fix because it was indeed caused by the change in 0.17.35.

See FFF-293 https://factorio.com/blog/post/fff-293 for more details, but it should be resolved now :).

Thanks to you for such a quick fix!