AAI Miner not harvesting trees

[Quax]

As the subject says. I'm using the AAI Miner to clear forests, but he miner neither uses the trees for fuel nor does he harvest them. They are just gone. Harvesting coal is working as intended.

Any help is appreciated.

Thanks

Edit: I discovered that this is only true with the normal miner, the AI miner is indeed harvesting trees. Is this an intended behaviour?