Sprite Sheet Asset Doesn’t Update After Modifying Source PNG

Release Type: Official Release

Version: 4.3.0.2507

Platform(s): Windows

Describe the bug
I’m having a problem with updating a Sprite Sheet when I change the source texture (image). First, I draw the image in PNG format. Then I create a Sprite Sheet asset that contains the individual sprites. When I build and run the game, everything displays and works correctly.

However, once I modify the source PNG image, the editor still shows an outdated thumbnail for the Sprite Sheet asset, and if I build and run the game again, the change isn’t reflected there either — the game still shows the original image. The only place where the updated image appears correctly is when I open the Sprite Sheet asset directly in Game Studio Editor, the editor shows the new image properly.

Sprite parameter change, deleting the obj folders or using Clean Solution in Visual Studio helps.

Expected behavior
The expected behavior would be automatic updating of the Sprite Sheet asset whenever its source files change.

Reproduce the issue in Game Studio Editor on Windows by changing a source PNG after creating its Sprite Sheet, then build and run the game again. Compare the stale asset thumbnail and runtime result with the refreshed image shown when opening the Sprite Sheet directly; done means source changes update automatically without changing sprite parameters, deleting obj folders, or using Clean Solution.