How do you properly use blocksToAvoidBreaking?

I added grass and dirt to the list but the auto miner seems to keep trying to break them.

Start by reproducing the auto miner behavior with grass and dirt listed in blocksToAvoidBreaking, then trace how that setting is read during mining decisions. Confirm whether the configured blocks are skipped; done means the auto miner no longer attempts to break them, with the relevant regression covered by an appropriate test if one exists.

Written by the indexing model from the issue text.