No polar bears spawning on Deep Frozen Ocean and Ice Spikes .
MC-155941 Rabbits and polar bears do not spawning on ice spikes.
MC-158026 Polar bear do not spawning on deep frozen ocean
MC-131587 Deep frozen ocean biome does not generate with ice on the surface
MC-155811 Pandas do not spawn on podzol,leading to pandas only spawning on bamboo jungle's edge grass block