Unreal Engine Issues

Unable To Add More Than One Element To Default Values For Maps In Blueprint

When adding new elements to a Map in blueprints it will return the error "Cannot add a new key to the map while a key with the default value exists". This is because it currently won't increment the ...

[CrashReport] UE4Editor_UdpMessaging!FUdpMessageProcessor::HandleSerializedMessageStateChanged() [udpmessageprocessor.cpp:548]

This is a common and longstanding crash that has occurred since at least 4.11. User DescriptionsI was just sitting around and it autosaved no source context available ...

Replication issues & warnings if a client hitches while the server seamless travels

If a client hitches while a server performs a seamless travel, the client will get multiple lines of logspam of these warnings:Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/ ...

Making a hidden level the current level changes tile position in World Composition

[AI] Navigation memory set in NavMeshMemory::ForAnyElementType::ResizeAllocation shows as Untagged in LLM instead of being under Navigation.

Licensee found that memory being allocated during a resize in NavMeshMemory is not being tagged within LLM as NavigationMemory but show in LLM as Untagged memory. They do not have a callstack showca ...

Blend Stack node doesn't have a valid FDeltaTimeRecord

The blend stack node doesn't generate any values for its DeltaTimeRecord.  This can be tested with the fix for [Link Removed] shelved at 32747789.  Since there isn't a tick record directly associate ...

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 ...

Duplicating a Function Containing Add Child Actor Component Causes Changes Made to the Duplicate to be Saved to the Original

When you create a function containing an Add Child Actor Component node, duplicate that function, and then change the Child Actor Class option in the duplicate, the changes are also saved to the ori ...

Blueprint variables get reset if not made Public

When a blueprint variable is not set to Instance Editable, its value gets reset at runtime. This seems to occur because the variable OriginalCannonTransform seems to get reset/nullified after being ...

Sound Cue with Branch or Switch node has incorrect duration when played in a level sequence

Sound cues with a branch or switch node will show in the sequence with the longest duration of any waves within the cue, despite which one will be played. During playback the section length will dif ...