[bug] Allow/Deny not applying for New Public Registration User

[viaprotocol888]

Describe the bug
Saved Allow/Deny rules for tags and custom column values not applying to new users created under public registration.

Manual account creation correctly follows the Allow/Deny rules set in Default Visibilities for New Users, but not when new users self-register when public registration is on.

To Reproduce
Steps to reproduce the behavior:

Confirm Public Registration is On

1. Go to Settings > Basic Configuration > Expand "Feature Configuration"
2. Check the "Enable Public Registration" checkbox
3. Click "Save" at the bottom right of "Basic Configuration"

Set default allow/deny tags for new users

1. Go to Settings > Edit UI Configuration > Expand "Default Visibilities for New Users"
2. Click on 'Add Allowed/Denied Tags' button
3. In the modal window, "Select Allowed/Denied Tags", enter a tag, eg. "MyDeniedTag", and click the "Deny" button.
4. "MyDeniedTag" and "Denied" rule will appear in a table to confirm the addition. Click "Close" button.
5. Click "Save" at the bottom right of the UI Configuration
6. Sign out, or open another session with a different browser.

Register a New User and Confirm Bug

1. Go to login page, and select Register
2. Register a new user
3. Lookup the new user's account with an admin account.
4. Note the default Allow/Deny rule is not applied to the new user.

If a new user is created manually, however, the default rule is applied correctly.

Expected behavior
The publicly registered user account should retain the default Allow/Deny rules set in Default Visibilities for New Users.

Configuration(please complete the following information):

• Hardware: Synology NAS
• DSM 7.2.2