Virtual joysticks is not properly working when running multiple clients in PIE

UE - Editor - UI Systems - Slate - Nov 21, 2017

When running multiple clients in PIE, It looks like first created viewport client handles every input event. I tried to narrow down the causes and found that it's because SlateApplication knows jus ...

When Client Side Navigation is enabled, it is only initialized Server Side

UE - AI - Jun 13, 2018

'Allow Client Side Navigation' no longer appears to register Client-side navigation in 4.20. In 4.19 the logic that was setup to check for it returns both Client and Sever Side navigation systems as ...

Delay Before Shot Warm Up introduces hitches

UE - Anim - Sequencer - Mar 29, 2019

setting a Delay Before Shot Warm Up can introduce hitches when rendering out a series of frames. ...

Scroll bar thickness is unaffected when set below 4

UE - Editor - UI Systems - Apr 9, 2019

Scroll bar thickness is unaffected when set below 4. There appears to be a minimum size in place that prevents the scroll bar from being set to a size lower than 4 ...

PCG Graph callback fails after compiling blueprint

UE - World Creation - Procedural Tools - Jul 9, 2024

PCG graph callbacks in BP do not appear to get called correctly after the blueprint is compiled. ...

Output log spams errors if blueprint variable is right clicked

UE - Gameplay - Blueprint - Apr 16, 2015

Errors spam in output log when any variable is right clicked in the blueprint event graph. Update: This seems to occur only in character blueprints. Attempted in Actor BP with no success. ...

World Position Offset Only Affecting the Z-Axis when applied as a Material to a Landscape

UE - LD & Modeling - Terrain - Landscape - Jul 6, 2016

When utilizing World Position Offset on Landscapes, the VertexNormalWS only pushes vertices in the vertical direction. Even if you are to sculpt an aggressive slope on the landscape, the vertices ar ...

10 or more Static Meshes set to Simulate Physics and Replicates Movement will crash the editor with PIE set to 2 or more players

UE - Networking - May 19, 2015

10 or more Static Meshes set to Simulate Physics and Replicates Movement will crash the editor with PIE set to 2 or more players. Less than 10 don't cause a crash. The user reporting this got a mor ...

Always consume mouse wheel for a scroll box does not appear to work when there are not enough items to scroll

UE - Editor - UI Systems - Apr 6, 2017

Always consume mouse wheel for a scroll box does not appear to work when there are not enough items to cause the scroll box to scroll. However, the tool tip says that the mouse input should be consu ...

Planar reflections do not work in OpenGL4

UE - Rendering Architecture - RHI - Jul 11, 2017

This is not a regression as it occurs in 4.16.2 The test case was just recently updated to test for planar reflections so not sure if this is intended to work or not. ...