There is flickering on displays, certain cockpit lighting elements, and/or TrueGlass with SLI alternate frame rendering enabled.
First, please ensure that your product is updated to at least version 18.104.22.168. Then, navigate to your Prepar3D v4 folder. Inside there, navigate to the SimObjects\Airplanes\TFDi_Design_717\Panel\LegacyRender and copy the panel.cfg and 717.dll folder up one directory (to Prepar3D v4\SimObjects\Airplanes\TFDi_Design_717\Panel).
This was an issue for some time, but thanks to input from our friends at Milviz and great effort from our developers and testers, it has been resolved.