Shadow quality med looking better then high

Hello everyone, yesterday changed the settings of “DefaultScalability.ini” file for my project and I noticed that my dynamic shadows look better on quality epic or medium, but on high is too blurry

Here is my config for shadows:
[ShadowQuality@1]
r.LightFunctionQuality=1
r.ShadowQuality=2
r.Shadow.CSM.MaxCascades=4
r.Shadow.MaxResolution=1024
r.Shadow.RadiusThreshold=0.05
r.Shadow.DistanceScale=0.7
r.Shadow.CSM.TransitionScale=0.4
r.DistanceFieldShadowing=0
r.DistanceFieldAO=0

[ShadowQuality@2]
r.LightFunctionQuality=1
r.ShadowQuality=3
r.Shadow.CSM.MaxCascades=6
r.Shadow.MaxResolution=1024
r.Shadow.RadiusThreshold=0.04
r.Shadow.DistanceScale=0.85
r.Shadow.CSM.TransitionScale=0.6
r.DistanceFieldShadowing=1
r.DistanceFieldAO=1

[ShadowQuality@3]
r.LightFunctionQuality=1
r.ShadowQuality=4
r.Shadow.CSM.MaxCascades=8
r.Shadow.MaxResolution=2048
r.Shadow.RadiusThreshold=0.03
r.Shadow.DistanceScale=1.0
r.Shadow.CSM.TransitionScale=0.8
r.DistanceFieldShadowing=1
r.DistanceFieldAO=1

Also I changed the value “Num Dynamic Shadows” of sun to 2

According to configuration it should be so or maybe I do not understand something?