UE5.4.0 usage extremely laggy

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Other

Summary

I installed the latest Windows version of UE5.4.0. Whether it’s creating a new blank project or upgrading past projects from 5.3.2 to 5.4.0, I encounter the same problem - after the project is opened, running for almost less than 5 minutes, the operation becomes extremely laggy. This lag is not due to insufficient frame rates, but feels like something is causing a sluggish response after consuming a large amount of memory. Lag occurs in the blueprint editing page, in the viewport, and in the bridge page. It lags no matter where in the UE editor. However, at the same time, there is no lag when switching to the desktop or other applications. Memory usage appears normal. Can someone help me figure out what’s going on and how to solve this problem? Thank you.
Besides,I’m working on the 64bit Windows 11 platform.

Steps to Reproduce

1. Create a new basic Level
2. open a project with UE5.4.0
3. add DirectionalLight to the viewport
4. add Skylight to the viewport
5. add SkyAtmosphere to the viewport
6. add ExponentialHeightFog to the viewport
7. add VolumetricCloud to the viewport
8. open the Level Blueprint
9. add some nodes to the Blueprint

Expected Result

Extremely laggy after around 5 minutes using UE5.4.0

Observed Result

Extremely laggy everytime

Platform(s)

64 bit Windows 11

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