Well, for me anyways ...

- I can't assign settlers to tasks
They'll say their usual line but then never actually do anything. Tested with both food and guard posts.
Once i assigned a settler, they just stand in whatever spot they were in and stop moving completely.
And then the assignment undoes itself and they show as unassigned again.
Even worse, each settler i tried to assigned is *removed* from the settlement count, i started with a count of 7 and now i'm at 0.
Thing is, they're all still on the bridge, they just can't move anymore.

- Churchill turns into Dogmeat
While building on the bridge, Churchill kept getting in my way so i tried to dismiss him only to realize i could only dismiss him to the same settlement (haven't unlocked any other yet).
I did that and he sat down in front of the workbench.
When i was ready to go out again i asked him to follow me and fast traveled somewhere else.
Upon arrival, his body was replaced with Dogmeat (But he still was labeled as Churchill).
I fast traveled back to the bridge and there he was still sitting in front of the workbench so now i have *two* dogs named Churchill, one of which looks like Dogmeat.
And both are interactable and react to my commands.