# Known Issues for Unreal Engine
There are currently a couple of known issues that may affect the development workflow. These are known issues and will be tackled in future releases of the Unreal Engine plugin or the
Snapdragon Spaces Services runtime.
If an issue is not present, check the overall SDK Known Issues
# Spatial anchor backwards compatibility issue
For apps built with plugin version 0.12.1 and lower, anchors are incompatible with Snapdragon Spaces Services version 0.13.0 and higher. You will need to compile your app with plugin version 0.13.0 or higher to avoid a crash when destroying an anchor.
# Reset position
Resetting the map position on map load is currently not working as expected.
# Unreal Editor startup issue
Some firewalls could prevent the Unreal Editor from starting up correctly. A way to fix the issue could be by renaming the CrashReportClientEditor.exe to something else in the Unreal Editor's install path under
# Rendering issues
# Widgets performance issue
When the app is deployed with the default
Development configuration selected, the framerate and performance decreases heavily when looking at world space UI (widgets) on the Viewer. Unfortunately, the root cause of this issue is unknown. When encountering issues with widgets, the
Shipping configuration should be selected instead.
# Crash when using Vulkan with Mipmapping
Building Snapdragon Spaces applications that use mipmapping with Vulkan will result in a crash. Disable generating mipmaps by setting the Mip Gen Settings dropdown to NoMipmaps in the texture settings under Level of Detail.
# AR System Issues
# Crash on app startup
Starting an AR Session on the first frame of the application (eg. On initial map's Begin Play) will crash in Unreal Engine 5.0. Build the application in the Shipping configuration or use a different engine version to prevent this.
# Crash when unlocking the phone
Unlocking the phone while having an AR Session running will crash in Unreal Engine 5.0. Build the application in the Shipping configuration or use a different engine version to prevent this.