Problems with case in windows (rename)

This is an issue. However, it is an issue with the Windows file system. It is not an issue with Syncthing. Windows is case aware, but not case sensitive. Syncthing on Linux does not have this problem because Linux file systems are case sensitive by default.

There is no solution short of the below:

fsutil.exe file setCaseSensitiveInfo <path> enable

See more details about this solution here (go to last post):