Not all add-ons are compatible with Vulkan and Metal. In particular, when Vulkan and Metal are enabled, 3-d drawing callbacks and map drawing callbacks are not sent to plugins.
If an add-on appears to not work correctly, you can disable Vulkan and Metal and restart X-Plane.
Needs update from developer to work with Vulkan/Metal:
- Aircraft using DreamEngine Sound
- Bandicam (prevents sim launch)
- Ground Traffic
- Flight Factor A320
- Flight Factor 767
- Flight Factor 777
- JAR A320
- JAR A330
- JCS Talon T38
- ToLiss A319 & A321
- X-Aviation Torque Sim Pocket Rocket
- XPRealistic Pro