iOS widgets are subject to strict system-level resource limitations,
and may occasionally stop updating on their own.
Restart your device, then wait 1–5 minutes to see if the widget refreshes correctly.
You don't need to remove or re-add the widget.
iOS enforces strict resource limits for widgets.
Widgets are typically allowed to auto-update only 40–70 times per day.
However, if Across updates a widget because of a calendar or task change inside the app,
it does not count toward this limit.