I saw this over on the PC sub-forum and had to post it here as well.

Is anyone else unable to use the display cases in any of the DLC homes?

I can't use any of them. I can't interact with them or put them in manually. They just sit there.

Hopefully this will be fixed with an update.

You mean the glass ones with the lids? I never interacted with them. I just drop items, exit, come back in then place inside case.

That's what I do since they don't have the "Activate" button on them.