Severe FPS Drops in UE 5.6 Editor — Even in Blueprint Editor (Unstable 3–16 FPS)

General Feedback & Requests
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Hey everyone,

I’m running into some serious performance issues in Unreal Engine 5.6.0 and 5.6.1, and I’m wondering if anyone else has experienced something similar.

I’m not just seeing FPS drops during runtime, but also directly inside the editor UI itself — especially the Blueprint Editor. My framerate becomes extremely unstable, sometimes dropping to 3–4 FPS, then jumping up to around 12–16 FPS, and back down again. This happens even when I’m not compiling or doing anything particularly heavy.