blindLinkOptions in Links cannot be restricted

[marcelmarty]

Issue description
The blindLinkOptions (File, Mail, Page, ...) in Links cannot be restricted to specific types. They always will be resetted after saving the content element.

System configuration:
TYPO3: 10.4.10
mask: 6.6.3
PHP: 7.4.12

Ways to reproduce:

1. Create a new mask element
2. Insert a repeating element (e. g. Links)
3. Insert a link element in the previously created repeating element (e.g. Link)
4. Edit the tab "Field Control" of the link element and disable some options
   
5. Save the content element
6. Return to the link element and check the tab "Field Control" again --> all options are active again
   

[nhovratov]

Hi @marcelmarty On a fresh installation it works fine.
How does the mask.json look like after the first saving?

[nhovratov]

Ok, now on a clean installation it behaves like you explained.
Edit: Seems like it only happens if there are two fields with the same name (link).
You probably have another field (not in repeating), which has the name "link" too.