Giant oak trees do not replace grass/moss blocks with dirt
Reopened
42
Giant oak trees do not replace the grass blocks they are spawned on with dirt. Tested in creative and survival with saplings grown both with and without bonemeal, and with naturally grown trees.
This bug has been reported to our internal bug tracker for further testing and a fix. It is scheduled to be fixed in one of the future updates (no specific date can be provided).
Tested in 1.14.30 and confirmed was fixed at some point.
Nevermind, it's not fixed. It appears that one giant tree variant does convert grass to dirt, or maybe it was just coincidental the first time I tested. With more testing, many oak tree forms did not convert grass to dirt, including one that was just a 5-block trunk with no branches.
Confirmed on Samsung Galaxy Note 3