Specific Blend Mode of Material on UMG render incorrectly when HDR is enabled

This issue occurs with the Additive and Alpha Holdout settings.

1. Create materials with Blend Mode settings such as Additive
2. Add Material Image to UMG and Add to Viewport
3. Launch Game
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   Enable HDR and launch
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Attached the repro project.
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HDR can be enabled by adding "r.allowhdr=1" to the engine's ConsoleVariables.ini.
For reproduction projects, you can change the HDR settings with the 1 and 2 keys.
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