Unreal Engine Issues

COND_InitialOnly doesn't apply to subobjects' properties created after the owning actor's initial replication

Package Map warnings when spawning primary asset class on server after seamless travel

This issue seems to occur due to the client keeping the NetGUID for the class/object, while the server will clean up this NetGUID during travel. When the client sends the class and its NetGUID as pa ...

Possession acts differently depending on whether or not "Run as dedicated server" is checked if newly possessed pawn is spawned just before possession

If a player on a dedicated server attempts to possess a feshly spawned pawn, the blueprint must have an unpossess node just before the possess node to be able to possess the pawn. This is not the ca ...

AsyncSaveGameToSlotForLocalPlayer does not properly handle multiple requests

ULocalPlayerSaveGame::AsyncSaveGameToSlotForLocalPlayer was designed to properly support multiple in flight requests at the same time, but the current code does not work correctly and this can cause ...

Vive / SteamVR locks to 45 fps and is "choppy" if 'Allow Reprojection' is enabled.

I know the fps capping is part of reprojection (rendering the frame twice), but compared to PSVR, something feels "off" and "choppy". Is the view suppose to update between frames? It feels like it m ...

HTTP GET requests are much slower than a Python script by a factor of 15-20x

Based on user report, a HTTP Get request from UE4 is 15-20x slower than if using a Python Get request to get the same file. ...

[Interchange][FBX] Issue with asset name clashes after auto import

The mesh changes and the asset name stays the same while the two FBX are completly different: different filename, different mesh names in the FBX CF video for repro steps. https://forums.unreale ...

Can't PIE or Save: Editor gets into odd state when editing parameters.

I've seen this happen in other areas of the editor as well: Data Table fields (floats) for example. Manually typing in numbers to fields seems less prone to this error; using spinners to drag value ...

Frame rate issues using Fixed Frame Rate and Matinee

Frame rate issues using Fixed Frame Rate and Matinee. This could be similar to some issues involving "Force Fixed Frame Rate". ...

Memory leak after simulating in Editor with opened 'Editor Preferences' tab

This can be repeated many times before the editor crashes without any messages and other programs with the video driver crashes too. Because out-of-memory. This is similar to [Link Removed]. This w ...