Directional Light flicker on UnrealEngine 5.3.1

Hi there, i have a bug with Directional light on UnrealEngine 5.3.1

The essence of the problem is this, on 5.3.1(Video) there is a flicker of the sun, regardless of whether it moves or not
On 5.2.1(Video) everything is usual and without problems

I googled it, but there’s nothing.
The only thing I found is that the Source Angle parameter turned up to max(5.0f) fixes this problem, but still not completely, the flicker is visible.
I assume this is a bug, as it was also in version 5.3.0, but was never fixed.
Checked on computers on the development team, the same thing.

If you know what the problems are, suggest ideas