After post purchase and clarity app abandoned checkout rate jumped to 70–80%

Social Media
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I sell products on my Shopify store using Facebook Ads. My abandoned checkout rate used to be around 30–40%.
After I installed a post-purchase app, the Clarity app, and made 4–5 test purchases, my abandoned checkout rate jumped to 70–80%.
No other changes were made: shipping terms and delivery times stayed the same, there are no hidden fees, and the checkout page load speed doesn’t seem to have changed significantly.
What could be the reason? Did my test purchases mess up the pixel, is the issue caused by one of the apps, or did Facebook simply start targeting a different audience?

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will try to uninstall these apps

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30–40% abandoned checkout from Facebook traffic was actually pretty healthy, so your base funnel wasn’t broken.

This feels more like Trust Friction than a pixel issue. When abandonment jumps that hard without pricing or shipping changes, it’s usually a confidence drop right at the payment step. Even small visual changes from apps (extra scripts, widgets, tracking notices) can make checkout look less “official” and more experimental, especially for cold FB traffic.

From the buyer side, checkout is the highest-risk moment. If anything looks new, layered, or slightly off-brand, people hesitate. And hesitation at payment = exit.

I’d focus on one thing: make checkout feel as native and clean as possible again.

  • Remove or temporarily disable the post-purchase app and Clarity for 3–5 days and compare abandonment.

  • Check if any extra banners, badges, or tracking disclosures now appear above or near the payment button.

  • Keep the area around the card fields visually empty and consistent with your brand (no extra colors, no extra boxes).

If the rate drops back, it wasn’t the audience. It was trust at the last step.