Unreal Engine Issues

Opening Gameplay Debugger while in PIE removes print string output from screen in subsequent PIE modes

If a user opens gameplay debugger ( ' pressed while in PIE), all print string outputs to screen disappear, and will no longer appear during any PIE session until editor is closed and re-opened. Wo ...

Setting NavModifierVolume's AreaClass at runtime does not result in navmesh rebuilding

The volume does accept the change and if it gets moved the navmesh will rebuild with new area set. The core issue is that setting NavModifierVolume.AreaClass at runtime does not notify navigation sy ...

Blackboard key filtering issues in BTTask_RunEQSQuery

User reported an issue with BB key filtering while using BTTask_RunEQSQuery. The filtering was inconsistent, sometimes filtering out keys of not matching type, sometimes not. User also reported sele ...

Compare Blackboard Entries returns incorrectly when comparing Enums

While investigating an issue with enum comparisons breaking when the enum changes, I discovered that the comparison will not return true if set to "contains NOT EQUAL values" and the values are not ...

Blackboard key selector losing set values in BTNode_RunEQSQuery

Seems that by manipulating blackboard key selector in BTNode_RunEQSQuery one can lose values set, and make BB key selection lose it's filtering (runt eqs should accept only locations and actor here ...

UBTTaskNode::ReceivedMessage crashing on memory-less BT nodes

NavMesh generates 90 degrees rotated for custom collisions

The NavMesh creates breaks at the wrong rotation if the mesh is using collision created from outside of UE4. This is obvious in a lot of the market content with special collision created in maya/3d ...

Blackboard keys in hierarchies do not get updated on editor changes to parent BB asset

Editor-time changes to parent BB asset do not get propagated to derived BB assets. ...

PerceptionSystem crashing on removing a listener as part of DestroyActor call

User reported a crash in UAISense_Hearing::OnListenerRemovedImpl when perception listener is being removed as a response to DestroyActor call. ...

DetourCrowdAIController causes AI to update movement differently

When you use MoveTo BT node, with a target set as Actor and your AIController is DetourCrowdAIController, the AI pawn will update its goal destination much less frequently. Instead of constantly fo ...