How to temporarily change player camera to "external BP" camera?

The camera I’m switching to is coded in BP to follow the player (let’s say a security camera). But when I switch to the camera via “Set View Target with Blend” I get static camera even though printing debug information about camera’s rotation reveals that it is actually following the player, just the new view ignores that (it looks like it uses the first “pose” camera had when I switched to it).

I tried setting the view every frame, but that doesn’t seem to work either.