Klaviyo flow stopped after a Shopify update — how to fix
Quick answer
A Klaviyo flow usually stops firing when the Shopify event or metric that triggers it changes — a renamed event, a removed integration permission, a checkout/app change that no longer emits the expected data, or an API deprecation. Because Klaviyo doesn't loudly alert you, abandoned-cart and post-purchase revenue quietly disappears; the fix is to confirm the trigger metric is still receiving events and re-map it, then monitor the flow's send volume.
Symptoms
- Abandoned-cart or welcome flow sends drop to near zero
- Flow analytics show recipients stalling at the trigger step
- Attributed Klaviyo revenue falls with no change to your campaigns
- It started right after a Shopify app, checkout, or integration change
Common causes
- The trigger metric (e.g. Checkout Started, Placed Order) stopped receiving events
- The Shopify–Klaviyo integration lost a permission or was reconnected incorrectly
- A checkout or app change no longer emits the event the flow listens for
- An API version deprecation changed the event payload the flow filters on
How to check
- 1.Open the flow and check the trigger metric's recent event volume in Klaviyo
- 2.Compare send volume week-over-week to pin the drop's start date
- 3.Review the Shopify integration status and recently changed apps
- 4.Send yourself a test event to confirm the trigger still fires end-to-end
How to fix it
1. Confirm the trigger fires
In Klaviyo, check that the flow's trigger metric is still receiving events. A flat line means the event stopped reaching Klaviyo — the real problem is upstream in Shopify.
2. Re-map or reconnect
Reconnect the Shopify integration or re-map the trigger to the current event/metric, then run a test to confirm the flow enters again.
3. Check filters and conditions
An API payload change can break a flow filter silently — verify the conditions still match the new event data.
4. Monitor send volume
Track the flow's send volume continuously so a future trigger break is caught in hours, not after a month of lost recovered revenue.
How Liulum helps
Liulum watches this path continuously and alerts you in plain English the moment it breaks — catching a silent failure in under a minute instead of hours from a customer complaint. Think of it as insurance for the checkout that makes you money.
Protect your storeFrequently asked questions
Why did my Klaviyo flow stop sending with no error?
Klaviyo keeps the flow "live" even when its trigger metric stops receiving events, so it fails silently. The usual root cause is an upstream Shopify change — a reconnected integration, a renamed event, or an API deprecation — that stops the trigger from firing.
How much revenue does a stopped flow cost?
Abandoned-cart and post-purchase flows often drive a large share of email revenue, so a silent stop removes that recovered revenue every day until someone notices — which is why send-volume monitoring matters.
Can Liulum monitor automation like Klaviyo flows?
Liulum's automation monitoring watches whether your workflows and webhooks keep firing and alerts you when execution stops — so a broken flow or integration is caught in hours instead of a monthly report.