The bug
Bees can sometimes get stuck in snow, then they do a spin dance as they try to path their way out. usually takes them about 15-20 seconds to get "unstuck".
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Can't see it cleary on this screenshot, but are there blocks behind the logs? If so, does MC-160520 describe your issue?

Sorry for the late response, no, the dark oak planks are a flush wall with the logs only being a decorative frame to the build.
MC-160520 doesnt appear to be the same issue as the bees are not passing through blocks, but getting stuck in the layers of snow.

In 1.16 Pre 3, though they can usually escape
Can confirm in 20w51a.
This looks like ic could be MC-170410, because the bee is pathfinding downwards to the flowers beneath the wooden logs. If you can still confirm the issue, could you verify that the behavior is different, and entirely dependant on the snow instead of the full blocks?