BP inside BP doesn't want to behave

Hello, I have the following problem:

  1. I have a BP of a playing board:

  1. I have another BP of an obstacle that I wanna put on the playing board - it needs to be a separate BP because I want to re-use it on different playing board and always be able to change the master BP at any point (it’s just a little physics-constrained spinning thing; I tested it outside this BP and it works correctly on its own):

  1. I drag the obstacle BP into the playing board BP, like this (I would presume this would lock it onto the parent static mesh, therefore moving and rotating with it, like the other things there):

  1. However, when I simulate this, the obstacle is not there. Just the empty board. When I turn on the wireframe mode, I can see that the obstacle is under the board:

  1. I found out that when I move the obstacle in the BP a lot higher, as in the pic below, then it shows up on the board, floating a little bit on the top (but not as high as in the BP):

And this is also where the ultimate problem is - it doesn’t tilt/rotate/move with the board. Whenever I attach anything else in the board BP to the parent, it stick to the board and moves and rotates with it. But this obstacle BP doesn’t. When I create the obstacle from scratch directly inside the board BP, it works correctly. But I don’t wanna do that because that would mean I would have to create a lot of them for each playing board (I have a lot of them) separately, and that would just be stupid. And idea how to fix this? Am I missing something? Thank you! Cheers.

Is the obstacle actor simulating physics? Can you show the hierarchy of this actor?

It is - like I said, when I remake the same obstacle outside the BP, it works properly. It’s literally just a little flat box static mesh with physics turned on, physics-constrained to the horizontal plane under so it can rotate freely. The interesting thing is that when I remove the physics constraint and stop simulating physics for the obstacle, it works properly when I insert the BP inside the board BP… Is it not possible to use a BP inside a BP when the inserted BP has a physics actor and a constraint inside of it? Or maybe a bug?
Oh and this is the hierarchy, it’s simple (the “pole” is just a visual thing without any collision):

331107-screenshot-2021-02-27-195247.png

Bump just in case someone can help me with this…