Recurring task name resets to "Weekly" after editing

[chrisvel]

Description
Recurring tasks are still behaving incorrectly. After editing a recurring task (adding tags), its name changed to "Weekly" and the original name disappeared. The task could only be found by searching "Weekly".
When renamed back to a descriptive name, search works, but in the Task detail page and Task edit page, the name still appears as "Weekly" (not permanently, only in those views).
Issue was reproduced in Firefox (with uBlock Origin and tracking protection disabled) and in vanilla Chrome (no extensions).

Expected

• Task names should remain unchanged when editing recurring tasks.
• Searching should consistently use the actual task name.
• Task detail and edit pages should display the correct, user-defined name instead of defaulting to "Weekly".