Unreal Engine Issues

MarkComponentsRenderStateDirty not called when bHidden is replicated

SetActorHiddenInGame will call MarkComponentsRenderStateDirty, but when the new value is replicated to the clients, the render state is not marked dirty when the change is received. ...

Light Propagation Volume does not work on Linux

It's easiest to see the change on the top of the table or back of the chairs when following the repro steps. I've attached screenshots of the Windows and Linux comparison with Intensity set to 20. ...

Removing a transform track from the sequencer will no longer clean up spawnable actor when the sequencer is closed

Note : Reopening the level sequence causes ensure failed. (also see callstack) LogOutputDevice: Error: === Handled ensure: === LogOutputDevice: Error: Ensure condition failed: InstanceRegistry->I ...

Niagara Parameter Collection doesn't work for Simulation Stage

SetConstraintBindingID of ConstraintSection on Sequencer cannot be set from Blueprint

The SetConstraintBindingID of the ConstraintSection on the Sequencer is the BlueprintPure function. The licensee is trying to parent and child objects on the Sequencer using sequencer scripting, and ...

Warning in Net.PacketNotify Test

Warning when running the packet notify test, regarding missed acks. ...

Crash in Network Prediction during PeriodicDamage GameplayEffects Test

Crash during Periodic Damage test for Gameplay Abilities system in the Network Prediction plugin, when both plugins are enabled.   Related to a null GameInstance. ...

Directories to never cook does not appear to be working

Marking as a regression as this issue did not occur 4.25.4 I've attached project logs and "unrealpak -list" output from both 4.25.4 and 4.26 to this ticket. ...

Editor crash when modifying Skeletal Animation Section of an unsaved additive animation

Unsaved animations can cause the editor to crash if they are in a sequence, if the sequence evaluates them after an edit.  ...

Actor Sequence Component doesn't work when actor is spawned in runtime

It works in the PIE and standalone mode. But after packing the build, the animation won't start in runtime. ...