When a link attribute is first created on Windows, its RMD_VERSION starts from one. When it gets created on Samba, its RMD_VERSION starts from zero. In a mixed Samba-Windows environment, this could potentially cause link conflicts to be resolved inconsistently (version is the first field checked).
Fixed by 4cb260f8c06edd3ab1f9a52867fc4d8124ebb0b5 for 4.8.0