Pandas spawn naturally in the new bamboo forest biome
According to the code, they have a very small chance to spawn in normal Jungles, but they only have a weight of 1 (for example parrots have a weight of 40 and skeletons have a weight of 100). The chances are further decreased because pandas cannot spawn on leaves. Bamboo Jungles on the other hand give pandas a weight of 80, and they have a lot fewer patches of leaves covering the ground.
Please check if /gamerule doMobSpawning is set to true. If it is, please tell us the seed of your world and the coordinates of the bamboo jungle in question.
Working as intended. The 1.14 article states:
According to the code, they have a very small chance to spawn in normal Jungles, but they only have a weight of 1 (for example parrots have a weight of 40 and skeletons have a weight of 100). The chances are further decreased because pandas cannot spawn on leaves.
Bamboo Jungles on the other hand give pandas a weight of 80, and they have a lot fewer patches of leaves covering the ground.