Relabeling files won't reflect the Label changes

I am running Microsoft Purview Scanner, where we scanned and applied the Default Label "Internal"  to all the documents in the file share for "One Folder". After that has been applied successfully, we realized that some of the Access Controls in the Label called "Internal" need to be updated. So we enabled Access control permissions for this label to include the "Export" option. 

I thought changes made to a published label would reflect already labeled files. But it doesn't. Even though we opened and closed one file and didn't reflect my changes.

Steps we tried:

1. Re-ran scan with the option to re-label existing files (already labeled files) with the same label to see if it reflect new changes. But nothing.
2. We reset the Scan service and restarted the server too. nothing worked.

Do anyone know if a Label is applied already to files in file share and we update some of the settings for the same label, with the changes reflect properly? I know it reflects in cloud, but not sure why it can't reflect in file shares