Stationary light in a blueprint gets displayed with red 'X' in Blueprint Editor viewport after opening the blueprint for the second time.

Steps to Reproduce

1. Create a new Blueprint Actor
2. Add a point light component to the actor, make the light the root, then change it to stationary mobility
3. Compile and save the blueprint
4. Close Blueprint Editor then reopen the actor
5. Switch to the Blueprint editor's viewport to see the light is now displayed with Red 'X'

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ComponentUE - Gameplay - Blueprint
Affects Versions4.164.17
Target Fix4.19
Fix Commit3636858
Main Commit3718205
Release Commit3813083
CreatedSep 11, 2017
ResolvedSep 11, 2017
UpdatedApr 27, 2018