The bug
Villages that are in other biomes such as savanna and taiga biomes don't have their own respective tree types in the chests of the blacksmiths. For example, acacia saplings for blacksmith chests in savannas.
MC-102893
Villages in other biomes don't have their respective saplings
Resolved
Fixed
7
(Unassigned)
Confirmed
Minecraft 1.10 Pre-Release 1, Minecraft 1.11.2, Minecraft 1.12.2, Minecraft 18w19b, Minecraft 18w20b, ..., Minecraft 18w31a, Minecraft 1.13.1-pre1, Minecraft 1.13.1-pre2, Minecraft 1.13.1, Minecraft 1.13.2
Minecraft 18w50a
Retrieved
Affects 18w19b. Because this issue is not maintained and updated properly (last update was in 1.11.2), I suggest that the ticket should be given to someone else (possibly me 😉)