Unable to assign USD primitives to render layers

**Describe the bug**
Neither legacy render layers nor the newer render setup UI allow for assigning USD primitives to layers. Dragging a UFE item from the outliner to the designated field has no effect.

**Steps to reproduce**
1. Import a USD stage
2. Open the render setup UI and create a collection under a layer
3. Middle-click drag a USD primitive from the outliner to the collection

**Expected behavior**
The USD primitive is assigned to the render layer collection

**Specs (if applicable):**
- Linux Centos 7
- Maya 2022.3
- Maya USD 0.14.0