Physics volume isn't visible in viewport, and doesn't have transform handles

I’m trying to place a physics volume in my scene, but whenever I do, it disappears. I see the wireframe of it when I drag it in from the place actor window, but once I actually place it, it disappears. On top of that, none of the transform handles show up on it when I try to switch to them (no position, no rotation, and no scale).

I know it’s in the scene because it shows up in the hierarchy and the details panels, and I can modify those transform values just fine. I just can’t see it in the viewport. I’ve also tried a few failed solutions (toggling game view mode, pressing Alt+O, restarting the editor), and on top of that, there’s a post-processing volume that shows up with the handles and wireframe just fine.

I’ve looked around, and can’t seem to find a solution, so if anyone has some insight, it would be greatly appreciated. Thank you!