The oak saplings grow inconsistently into big oak trees even if there is a block places above it like in 1.15. TNT tree farms can no longer reliably farm oak trees because of this bug since they break due to large oak trees.
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Comments 5
Thank you for your report!
However, we are already tracking this issue, and this report is a Duplicate of MC-15224, which is a report that has not been resolved yet.
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This issue was posted years ago and was only updated to I glide the 1.16.1 update and it’s pre-releases. The latest comment in from 2018.
What kind of block do you have above?