What's the problem with the PCG map flicker?

What’s the problem with the PCG map flicker?

I’m using engine version 5.4.4
It’s a map created by PCG and I’m using Lumen~ It blinks a lot like the attached video. Is there any way to solve it?

Greetings @cross09072!

A similar issue involving flickering was covered in another thread, please test the provided solution for your scenario:

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