Unreal Engine Issues

Existing data can be lost from a datatable if the datatable is based on a struct that contains an array of another struct

If a DataTable is created in the Editor based on a struct that contains an array of a second struct, and a change is made in the second struct, any existing data values that have been entered into t ...

Renaming the Default Meshes Folder to Include [] Causes Duplication Issues

Renaming the meshes folder to include [] characters causes the static meshes to lose their mesh upon being duplicated. ...

Multi Line Trace by Channel includes Actors with Overlap collision in the Out Hits array

Multi Line Trace by Channel includes Actors with Overlap collision in the Out Hits array (but does not indicate a True Return Value). The two returns match with Ignore and Block collision settings. ...

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 ...

No way to 'make editable' a tile map component using an asset

API to get tile center/corner/etc... locations is not exposed to Blueprints

NavLinkProx's link direction issues

NavLinkProxy does not react to changes to LinkDirection in the editor. it also seems that link direciton setup doesn't get applied even when link's update is forces by moving NavLinkProxy actor. ...

Calling UBehaviorTreeComponent::StopTree from a BT node can result in a crash

This is in general not encouraged, but should not crash. The reason it's crashing is that in UBehaviorTreeComponent::Tick we process node ticks first and then try to access InstanceStack[ActiveInst ...

AIController.BrainComponent not being set to user-created BehaviorTreeComponent instance

If a user manually created a UBehaviorTreeComponent for his custom AI controller, but forgets to set AIController.BrainComponent to point at that BT component then a fair amount of assumptions break ...

Add Particle System Component Template Context not functioning

Also Reproduced in Main Promotable-CL-2535351 In the Add Particle System Component node, there is a Component Template Context input which does not seem to function and establish a template for the ...