Clipping issue with ortographic camera

I’m trying to create a top-down RPG with an orthographic camera, but I decided to start from the third person template (instead of the top down template) since it had more things I want to reuse.

Overall it looks ok, but I’m having an issue when the player gets behind walls. See the screenshots below: As soon as the wall covers the player chest, the camera clips through the wall and I can see some black areas at the bottom of the screen. I suspect that is related to the camera boom somehow, but I’m not sure what exactly causes it. Any help would be appreciated.

Here the character is behind a lower portion of the platform. It looks ok:

Here, I moved the character to the right, towards the ramp. You can see the camera clipping through the wall and some black blur at the bottom:

Here I moved the character back a little and the issue is gone