Scroll bar jumps to the top of the window when changing Output Log 'Categories' checkboxes

Tools - Aug 8, 2017

When the Categories dropdown is changed in the Output Log, the scroll bar will jump to the top of the page. This does not match the behavior of using the search bar which will keep the scroll bar a ...

Setting Tick Interval in GameMode to non-zero causes the game to freeze on pause

UE - Gameplay - Sep 22, 2016

If Tick Interval is set to something non-zero, the game will freeze when Set Game Paused is called. If not manually closed through the Task Manager, this will lead to an out of memory crash. This ...

Root motion can accumulate large force until finally extracted

UE - Gameplay - Player Movement - Jan 19, 2018

Root motion can accumulate in some cases and then apply a huge force when it ends. See https://udn.unrealengine.com/questions/411340/root-motion-accumulated-while-unused.html ...

Nested struct splitting gives incorrect node input for fast path

OLD - Anim - Mar 8, 2019

When any of the inputs to a fast path node are connected from a struct member from multiple splits or splits combined with breaks, all input connections to the node will be effectively ignored, inst ...

Setting spline in Niagara Override Parameters corrupts system after closing level

UE - Niagara - Mar 19, 2019

The USplineComponent appears to be corrupted. It will pass the null check, but operations done on the data cause the engine to crash. (See the linked UDN for more details) ...

Date and Time variable does not appear to replicate across clients

UE - Foundation - Core - Oct 22, 2015

The Date and Time variable does not appear to replicate when set to be replicated. If the variable is called on a client the client will not update properly. ...

Button remains in hovered state on mobile device

UE - Editor - UI Systems - Jul 11, 2016

If the user touches the screen of a mobile device and then drags their finger over a button the button will remain highlighted as though it were being hovered. Note: This was tested on the Samsung ...

Numpad + Shift does not release keystrokes

UE - Gameplay - Input - Nov 9, 2021

The combination of Numpad + Shift seems to have various problems. https://answers.unrealengine.com/questions/899468/what-is-the-issue-with-shift-num-key-combinations.html  Regression No, according ...

Niagara Not Working with Volumetric Materials

UE - Niagara - Jul 13, 2018

Niagara will not work with Volumetric Materials. Found in 4.20 Preview 5 CL# 4173640 and 4.21 CL# 4207835 ...

Deactivating a shot section from scripting does not affect evaluation

UE - Anim - Sequencer - Jun 23, 2021

Disabling a shot from scripting will not affect evaluation of the sequence.  ...