[intermittent] Shortcuts widget intermittently empty/out of sync

Steps to reproduce

1. Ensure Website Shortcuts (Top Sites) are visible with a specific order (e.g., 6–8 sites with favicons).
2. Add the Firefox “Websites Shortcuts” widget on iOS (Today’s widget/Home page widget).
3. Compare the shortcuts shown in the widget with those on Firefox → Home Screen.

Expected result

Firefox’s widget loads consistently and shows the same sites, order, and favicons as Home Page Website Shortcuts

Actual result

• Sometimes the widget stays empty
• Other times it loads but displays an outdated list/order

Device & Build Information

• Devices: iPhone 14+ (iOS 16.0.3), iPhone 16 Pro
• Build: v143.2 (62039)

:information_source: Reference Person

+@Foxbolts+

┆Issue is synchronized with this Jira Bug