Unreal Engine Issues

No warning is shown when a disabled mobile shader permutation is required for rendering

bIsComposing assert with Japanese MS-IME input(candidate list related)

When using MS-IME as Japanese input method, scrolling out the text field out side the view causes bIsComposing to be set false - this state causes instability of the editor. Crash happened with Win ...

Incorrect usage of FText in EnsureMsgf does not trigger a compilation error, leads to crash in shipping

Using incorrect formatting in FText does not cause compilation errors in EnsureMsgf as it does in other functions such as UE_LOG. This causes crashes to sneak through such as a crash on ensure when ...

Setting Fullscreen Mode to "Fullscreen" results in Crash when using 4.23 from source

Changing the screen settings to Fullscreen through code or blueprints results in a crash. This only happens in the source version of 4.23 and does not occur in the binary version of 4.23. I have att ...

Inconsistent media texture new style output state across the engine

A simple search for `NewStyleOutput = true` will reveal the many instances where this flag is already forced on, including media plates and media bundles. This however means that we have incompatib ...

Upgrade View and Work range scripting functions precision from float to double

The view and work range scripting functions use float values for their seconds, which leads to precision issues, as these values are stored as doubles.  ...

Math Expression nodes cause packaging to fail.

When using a math expression node within a blueprint, the project will fail when packaging. ...

Skeletal Mesh with Tessellated Material causes Excessive Blur

With a Tessellated Material, either Flat or PN Triangles, applied to a Skeletal Mesh when playing, the Mesh has excessive blur when in motion. If you use the same material and turn off tessellation ...

Packaging a plugin from Plugins Editor UI wipes the target folder before packaging

"Package Plugin" from Plugin Editor UI will wipe the target folder’s contents first then populate it with plugin files. User was expecting “Package Project” like behavior: Create a new folder in th ...

Adding array element of instanced meshes during simulation does not increase amount of elements in array

Adding array element of instanced meshes during simulation does not increase amount of elements in array. Regression (No) issue (does) occur in 4.10.4 ...