Reddit user linkin06 points out that you can add notifications whereby Chase will notify you when a Chase Offer is used. You can get the notification via email or a mobile notification in the app.
To get notifications go to the Chase Offers page and click ‘Update alert preferences’ at top-right. Then toggle through your cards and save it on each. (You can also find it in Profile > Manage Alerts.)
Hopefully the notifications will come quickly and cause less fretting about whether an offer will post. Please share your experiences if you’ve been using this feature.