Blender Version
Broken: version: 2.90 (sub 0), branch: master, commit date: 2020-04-26 22:57, hash: rB13abd3784ad0
Short description of error
Toggling collections with drag doesn't work in the UI panel when local collections are enabled.
Exact steps for others to reproduce the error
In the default scene, have two collections and from the UI panel, turn on the local collection and try to toggle both collections with a drag.