Having an actor with a WidgetComponent + DrawAtDesiredSize will cause a lag spike when size changes in VR.
Additionally, If you enter a value other than 100 in SetWorldToMetersScale the 'draw at desired size' widget will cause a glitch. [Link Removed]
Did not see spike or glitch with Oculus Rift.
Test project attached.
Project contains a widget with a Text Block that changes every 2 seconds (SetText)
In the Actor -> Widget Component. Draw at Desired Size is enabled
User Submitted Repro video: [Link Removed]
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-85328 in the post.