I’ve the same issue, although for me starts from the minute I load a project and is not FPS drop, but freeze, it runs smoothly for 1 second and then it freezes for 1 second and this goes on an on even if I create a new basic project from UE5.4 templates or I load and convert a project from UE5.3.2.
This freeze lag is everywhere no only in the render window, but even while scrolling ‘project setting’, plugins, outliner, details, etc…
In UE 5.3.2 my project run smoothly, but in UE5.4 is literally impossible to work.
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