Can't save LDAP form when hidden field is invalid

[jakub-tldr]

Screen.Recording.2026-08-14.at.11.42.09.mov

[jakub-tldr]

Test scenario:

1. Enable two-way sync
2. Enter invalid synchronization interval (for example 5)
3. Switch to one-way sync
4. Try to save form - it should work
5. Enable two-way sync
6. Try to save form - it shouldn't work
7. Enter correct synchronization interval
8. Try to save form - it should work