I don't even have a light_directional, only have light_environment, sunlight_shadow_control and shadow_control and have the same problem as MaanMan (blue tinted dynamic shadows with fade to black borders).
Edit: I tried RZL's suggestion, light_env replacement didn't work. Compiling LDR/HDR seperately showed, that it's definitely on the HDR part. I tried to find out whether it might be affected by the shadow color specified in the shadow_control entity but it produces the same results.