Shadows Flickering/Noise Issue

UE 5.5.1

Issue:

Shadows had a flickering effect, looked like random noise.

Tried:

Changing Anti-Aliasing options in Project Settings. Found that while it didn't remove the noise, it did decrease it noticeably. Temporal Anti-Aliasing (TAA) and Temporal Super-Resolution (TSR) were the best options.

Distance Field Shadows in the DirectionalLight was turned on, but didn't notice any changes. Might still be a good idea to enable it though.

Solution: 

Increasing the "Samples Per Pixel" solved this issue. 

4 seems to be enough to get rid of most of the noise. 8 removed the noise and flickering completely.