There's just single or double oak log blocks everywhere instead of large oak trees. Noticed this in Forest, Jungle and Jungle Edge biomes so far. Also tried to grow large oaks with bone meal, which gives the same result, so I assume this is a general issue with this type of tree.
UPDATE:
After further invesitgation, we can tell that the stumps are actually the so-called "balloon oak" variant generating upside down. They only generate leaves when air is underneath though, as sometimes visible in caves. The following superflat preset shows the issue very well:minecraft:bedrock,10*minecraft:air,minecraft:grass_block;4;decoration
The actual large oak trees with branches don't seem to generate at all, this issue was moved to ticket MC-124952.
Related issues
is duplicated by
MC-124887
New world generator spawns 1 block of wood on the ground
MC-124932
Buried trees? !!!!
MC-124993
Oak Tree is bug generate in biomes: Forest,Ruffer Forest,Extreme hills+, Plains
MC-125117
Reversed oak tree
MC-125119
Upside Down and Adjacent Trees!!!
MC-125160
Trees grow down
MC-125176
Generation problems
relates to
Attachments
Comments
migrated
migrated
These are actually trees generating upside down.
_zombiehunter
No they aren't, even underground there's only stumps
_zombiehunter
@ [Helper] Les3awe I think my ticket offers a better description of the issue. This bug is specific to the large oak trees, you can even try to grow them yourself with bone meal and still get stumps. MC-124887 doesn't go into detail at all.
NeunEinser
@unknown Yes, they are upside down trees. They even generate leaves if there is air underneath. Attached screenshots.
Large oak trees not generating is a different bug.
This can be best observed when generating a flatland world with the setting minecraft:bedrock,10*minecraft:air,minecraft:grass_block;4;decoration
_zombiehunter
Good observation, NeunEinser, looks like it actually is the so-called "balloon oak" variant that generates upside down and most of the time missing leaves underground. Will edit the ticket to correct this and add your superflat preset. The standard large oaks seem to be missing completely in all biomes.