A feature stopped working after I changed my plan

Short answer: the feature, or an option inside the rule, is not included in your new plan. The rule is kept in the app, but it is not published to your storefront.

What changes after a downgrade

Situation	What happens	Fix
Module not included in the new plan	The module stops on the storefront	Choose a plan that includes it
Rule uses product tags or specific markets below Advanced	The rule is kept but not published	Upgrade to Advanced or Platinum, or edit the rule
Rule uses specific variants below Platinum	The rule is kept but not published	Upgrade to Platinum, or edit the rule
On the Free plan	Custom Pricing, Volume Pricing and Registration Form work with limits (for example 1 Custom Pricing rule, 1 Volume Pricing rule with 2 ranges, 1 form)	Upgrade for the full version

The app shows banners such as “Some Custom Pricing rules became inactive after your plan change” and “This rule is automatically INACTIVE on the storefront because some configurations are available on a higher plan.”

After changing plan

Check the module is on in its card in the app.
Open an affected rule and save it again.
If the storefront still shows the old state, wait about 5 minutes and save once more.