Unreal Engine Issues

Static Lights with IES Profiles Will Bake an Incorrect Lightmap

When using an IES profile with a static light, the lightmap that gets baked will lose all detail of the IES profile. Example project attached. This doesn't occur in 4.19 CL# 4033788 Found in 4.20 ...

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. ...

Replicated component leak on clients if RPC forces construction and server destroys it in the same frame

RPCs called on actors force a channel to be opened and the actor to be replicated at least once. If the RPC is called on a new replicated component while the actor channel is already open, but the ...

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 ...

Component in BP can't be created if bCookBlueprintComponentTemplateData is true in 4.21

Material Artifacts When Using World Position and Pixel Normal Together

When using "World Position" and "Pixel Normal" nodes together. it causes artifacts in the material. In 4.19 CL# 4033788 this did not occur with the same material setup. Found in 4.20 CL# 4369336, 4 ...

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\Engine\Build\IOS\AppleWorldwideDeveloperRelationsCA.pem is out of date.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 ...

DECLARE_EVENT Broadcast() can be invoked outside of it's contained class.

In UE 4.21, The current functionality that exists for DECLARE_EVENT Broadcast() does not function as the docs describe: [Delegate Events|https://docs.unrealengine.com/en-us/Programming/UnrealArchit ...

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 ...