Unreal Engine Issues

Performance drop when spawning AI actors during runtime compared to placing them in world

There is a performance difference between spawning and placing AI into a level. This is causing issues when spawning/despawning AI actors in a large open world, where 4-5ms of frame time quickly bui ...

Crash when executing Rename Asset or Duplicate Asset and other functions in Scripted Actions

In Scripted Actions, if you execute a function after using Rename Asset or Duplicate Asset, it will crash. If you do not execute the function it will not crash. ...

Datasmith error when attempting to package - Error: Ensure condition failed: It->Value File:Engine\Plugins\Enterprise\DatasmithContent\Source\DatasmithContent\Private\DatasmithAssetUserData.cpp

When r.CustomDepth = 3 (Enabled with Stencil), the values of SceneDepth and CustomDepth are different on IOS

The user wants to express using the difference between SceneDepth and CustomDepth. However, when r.CustomDepth = 3 (Enabled with Stencil), the expression can not be realized because the SceneDepth a ...

Enabling Merge GC Clusters and Blueprint Clustering causes a packaged Window project to crash

Enabling the check boxes for Merge GC Clusters and Blueprint Clustering causes packaged Windows projects to crash on startup. The log and dump files regarding this crash have been attached to this t ...

Only the last simple collision added to a static mesh is counted for sweep

When using multiple simple collisions on a static mesh it appears that sweep only uses the last collision added when calculating when/if to stop. ...

Vehicle destroyed when long stiff value is set to 0

When setting the Long Stiff value to 0 for wheels it appears to destroy the actor as soon as the wheel come in contact with the ground ...

Engine\Build\IOS includes an expired certificate

\Engine\Build\IOS\AppleWorldwideDeveloperRelationsCA.pem is out of date. This causes a warning to appear when submitting app.  Workaround: Install latest WWDR ( https://answers.unrealengine.co ...

Hot Reload cannot be performed when using the DebugGame Editor configuration

In 4.21.1 it is no longer possible to perform a Hot Reload when the game is open in the Editor and using the DebugGame Editor configuration. REGRESSION: Yes. A Hot Reload was possible in 4.20.3 whe ...

Virtual Bone effect is lost after re-importing mesh

After setting up a Virtual Bone on the skeleton and having it drive a Skeletal Control Node in an Animation Blueprint. Reimporting the skeletal mesh will cause the setup in the Anim BP to revert bac ...