MrTheRich -
You issue is a lot different than Riggs original post because you are using a Translucent surface. First I am going to assume that you have turned SSR intensity to 0 in a Global Post Process Volume and that you have added a sphere reflection actor and skylight to your level and you are still getting the results above.
If you haven’t done that, please stop and try that now.
Next, uncheck Screen Space Reflections under Translucency.
Eric Ketchum