Every time the Unreal Editor（5.1） is opened, the project will roll back to the old compiled version, anyone know why, thank you!
That must be frustrating. Have you looked at this: Disaster Recovery | Unreal Engine Documentation
If you are using source control (e.g., Git, Perforce) to manage your project, it’s possible that there are conflicts between the current state of the project and the version that was last committed. Try resolving any conflicts or reverting to a previous commit and see if the problem goes away. It’s also possible that some of your project files have become corrupted, which could be causing the rollbacks. Try verifying the integrity of your project files by using the “Verify” option in the Unreal Editor’s launcher, or by manually deleting the “Intermediate” and “Saved” folders in your project directory and recompiling the project.
Lastly, if you are using third-party plugins in your project, make sure that they are compatible with Unreal Engine 5.1 and are up-to-date. Outdated or incompatible plugins can cause unexpected behavior and crashes.
Same problem on UE 5.3. After restart UE editor all my changes just disapear.
It’s driving me crazy, I don’t fully understand why this happens. The first time I changed the level and restarted the editor, the changes were applied. But when I tried to change the level and blueprint, after the restart the editor returned all the changes before the first one.
Had to disable live coding, looks like temporary solution