Unreal Engine Issues
Unreal Engine Issues
TArray64 RangeCheck prints the incorrect error messages for values over 32-bit length
UE - Core - Systems - Apr 27, 2022TArray64 RangeCheck prints the incorrect error messages for values over 32 bit. Repro Rate: 4/4 Tested this in //UE4/Release-4.27 @ CL#18319896 and the issue did occur there, it is not a regressi ...
Can't preview correctly when using Lookat Track with [Can Blend] enabled
UE - Anim - Sequencer - Feb 15, 2021When I play it in PIE, it plays fine. This problem does not occur in 4.25.4. ...
WorldPartitionConvertCommandlet hits an assert when converting a persistent level that contains a sub-level with a landscape
UE - World Creation - Worldbuilding Tools - Nov 7, 2025Context: The Window tab allows a user to open the Levels window in order to add a sub-level to a persistent level. For Unreal Engine 5.0 and beyond, World Partition has made the Levels window obsole ...
Gamepad button press and hold does not hold focus
UE - Editor - UI Systems - May 25, 2017When using a gamepad (Tested with an X-box 360 Controller) if you press and hold a UMG button down and then use the D-pad or another form of movement the currently pressed widget component (In the t ...
UX Regression on Open Asset Panel
Tools - Aug 31, 2015In 4.8.3, open asset would allow you to type the beginning on an actor name, then press the down key and select it. In 4.9 p4, it takes an extra down key press to get to the list; Upon first down a ...
Adding Text Widget BP as "Widget Class" in Actor Class BP and compiling multiple times, changes Text visibility in Viewport
UE - Editor - UI Systems - Sep 15, 2017Adding a new Text Widget Blueprint as a Widget Class to a new Actor Class Blueprint changes the visibility of the Text in the Viewport when compiling the Widget Blueprint multiple times. Regressio ...
Hot Reload Temporary dlls and pdbs Aren't Getting Cleaned Up Between Runs
UE - Foundation - Cpp Tools - Hot Reload - Dec 14, 2020I'm seeing it as an issue in at least 4.25.4, maybe prior. I'll update after checking 4.24. From the tests at my desk I could see that the HotReload.State file that DeleteTemporaryFiles (HotReloa ...
ResavePackages commandlet with Build Lighting applies level transform each time
UE - Foundation - Core - Cooker - Sep 13, 2016While using the commandlet for RebuildPackages with -BuildLighting and having any sub-levels with level transforms will be added to the current position each time this commandlet is run. As an exa ...
Socket Snapping in level editor no longer works
Tools - May 14, 2018The Socket Snapping level editor action no longer works in 4.19/4.20, it worked in 4.18 but regressed. It still attaches but it's set to maintain it's world position, so it doesn't actually snap. T ...
Crash in a packaged project when loading into a level after a nativized Anim BP grabs a PoseSnapshot using a FName
OLD - Anim - Oct 25, 2019In packaged projects will crash when an animation blueprint that is nativized loads into a new level. The anim blueprint needs to use the PoseSnapshot node with a FName variable passed before loadin ...