The laser for the motion controllers is currently not being hidden when a Menu/UI panel is docked to the controller. This is a Regression from 4.14 and prior, as shown by the attached screenshots.
The laser is still hidden when the QuickMenu is being summoned, but docked UI panels no longer hide it.
Note: Requires a PC configured for Oculus/SteamVR and an attached Oculus or Vive with Touch controllers
Expected Result: UI panel should be summoned and hide the laser pointer
Outcome: Laser is still visible behind the UI panel
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-40070 in the post.