Highly reduced version of MC-279295, which was basically 3 issues in one.
The farm animals cold biome tag lists taiga variants and windswept non-savanna biomes all as cold, yet frogs are temperate in all of them except snowy taiga.
Since the biome tag defines the biome as a cold biome, it's expected that the frog would also be of the cold variant.
Full list of affected biomes: old_growth_pine_taiga, old_growth_spruce_taiga, taiga, windswept_forest, windswept_gravelly_hills, windswept_hills.
Can confirm.