Unreal Engine Issues

Recent change to Material Expression code missing a case for "exp2" function in switch (cpp)

The function "FMaterialDerivativeAutogen::GetFunc1ReturnType(...)" does not have a case for "EFunc1::Exp2". Also found in Release-5.4, CL: 331987674 ...

Sequencer UpdateTimeCursorPosition can set TimeCursorPosition beyond the end of the track when stopping

After calling Stop() in UpdateTimeCursorPosition (LevelSequencePlayer.cpp:392), we continue on to set TimeCursorPosition to NewPosition. At this point, NewPosition is beyond the end of the track. A ...

Evaluate ClampedPow material function

ClampedPow seems to have been added as a way to tackle common compile warnings and edge cases (particularly NaNs), but the code shouldn't be calling both an abs() then a max(). This causes negative ...

Pawn Velocity dramatically different on server and client with Client Authoritative Position

The server is not seeing the correct walking animations on each of the clients and after doing some digging, we found that the Pawn->GetVelocity() function is returning something drastically smaller ...

Some developers reporting incorrect Preview in VR resolution for Steam VR

VR Preview Window is the wrong resolution, just showing the top left portion of the entire view. Somewhat similar symptoms to -[Link Removed]-, not exactly the same though.   This issue has not be ...

Preview Rendering Level Android Vulkan will crash the editor in VR Template

DTLS Handler Component module cannot startup on Xbox

It seems as though enabling the DTLS handler component no longer functions on Xbox, and it's possible enabling this packet handler no longer works on other platforms as well. It may also be worth in ...

Lumen artifacts on splitscreen during camera cuts

A UDN licensee has pointed out that they are seeing unresolved Lumen reflection artifacts when they are running their game in split-screen mode. A video of this behavior is found in the Related tab ...

Crash in FPBDJointUtilities::ConditionInverseMassAndInertia

We seem to be setting the InverseInertia to zero, even though the InverseMass is non-zero. FPBDJointUtilities::ConditionInverseMassAndInertia assumes that the inverse inertia is only zero if the in ...

Console command "setMouseSensitivity" locks mouse movement to the X axis

Using the console to set mouse sensitivity locks mouse movement to the X axis. ...