Linker exception opening project project after updating to 4.25.4

UE - Gameplay - Blueprint - Oct 27, 2020

User has encountered an exception opening their project when they updated from 4.25.3 to 4.25.4. No repro, log or test project is given at the time. ...

Nav Area class is reset after updating from 4.19.2 to 4.20 Preview 3

UE - AI - Jun 21, 2018

When upgrading a 4.19.2 project to 4.20 Preview 3 the Nav Area Class is changed to None instead of the value it was before the upgrade. Upgrading from 4.18.3 to 4.19.2 works as expected. This was t ...

Function input Bool loses checked value when updating from 4.16 to 4.17

UE - Gameplay - Blueprint Editor - Oct 17, 2017

Licensee reported that when updating from 4.16.1 to 4.17.2 the value of a function input Boolean is being reset. It is checked as True in 4.16, but when switching to 4.17, it is no longer checked. ( ...

Enabling Tessellation on Materials in 4.11 causes geometry to Disappear

UE - Graphics Features - Dec 23, 2015

Any material that already exists in 4.11p1, with tessellation enabled, causes assigned geometry to disappear. Any material created within 4.11p1, with tessellation enabled and a base color, causes t ...

Attempting to package 4.10 project prompts user to install VS2013 rather than VS2015

Tools - Dec 17, 2015

When attempting to package a 4.10 project, if VS2015 is not installed an error window prompts the user to install VS2013. Image of error message shown in AH URL. This has not been reproduced inter ...

Retargeting Root Motion not working in UE4.10

OLD - Anim - Nov 24, 2015

Retargeting root motion results in the target animation appearing to "slide" on the ground or "hover" as if hanging from the pelvic bone. This has been reported to be fine in 4.9 but multiple users ...

Overlap trigger on Event Begin Play doesn't work after converting project from 4.7.6 to 4.8 P2

UE - Gameplay - May 18, 2015

Overlap trigger on Event Begin Play doesn't work after converting project from 4.7.6 to 4.8 P2. The user thought this was related to using Custom collision object types but it is reproducible with ...

Changing WITH_SUPSTEPPING prevents 4.10 from compiling

UE - Simulation - Physics - Nov 24, 2015

In the file EngineDefines.h, changing 37 to read "#define WITH_SUBSTEPPING 0" will cause the solution to fail the build process. ...

Noticeable Difference In Temporal AA Sharpness From 4.12 To 4.13

UE - Graphics Features - Oct 17, 2016

There seems to be a noticeable difference with the temporal AA sharpness in 4.13. This was confirmed by setting Temporal Sample count and sharpness with the same settings in a 4.12 project. A side b ...

Regression for changes in code character movement not affecting multiplayers

UE - Foundation - Core - Jun 26, 2015

If MoveForward() function is changed to affect the speed of the player, when playing in a multiplayer game player 1 will be affected by the change but player 2 will not be. This is a regression - i ...