The Group policy is configured: Computer Configuration\Administrative Templates\windows Explorer - " Verify Old and New folder redirection targets point to the same share before redirecting" is Enabled to prevent data loss.
You configure Folder redirection for users to redirect multiple folders to a file server. For example:
Appdata - > Local profile Documents -> \\filer1\<username> Music -> \\filer1\<username>\My Music Pictures -> \\filer1\<username>\My Pictures Videos -> \\filer1\<username>\My Videos Contacts -> \\filer1\<username>\Contacts Links -> \\filer1\<username>\Links Downloads -> \\filer1\<username>\Downloads
After logon only some folders are re-directed but others are not. For example the contact folder may be re-directed but no others. The behaviour of which folder gets redirected is inconsistent as well.
The problem happens regardless if the user previously had redirected folders or not.
If you Disable the GPO setting "Verify Old and New folder redirection targets..." the FR works as expected.
The problem is caused by a code defect in the FR component.