This bug was a thing back in 1.13, but it was quickly patched out. However, it has returned in this snapshot, and only recently did I find (only) 2 trees that generated in this exact manner.
The seed is 5419467522569981067 and the coordinates are -514 89 416
Duplicate of MC-125007. In the future, please check if a bug already is reported by searching before creating a new ticket.