under no circumstance can I reproduce your issue.
Latest CSP-preview + Sol 2.2. Tested with standard, custom and SOL filters at several daytime points and months of the year.
there is a mesh split at the point of your video, but the material is consistent and extends well before and after your issue.
as I mentioned, your issue is the only one to report out of +1000 downloads.
synopsis: something on your side, I suspect a far planes or shadow splits.
Disable any extra processing plugins like fake shadows, skidmarkfx, graphics adjustments, smart shadows, etc for trouble shooting