Did you recently add an app to your store for pop ups? If so, this would most likely be the culprite and you'd need to uninstall it and remove any code you have added to get rid of the pop up going forward.
If you aren't sure about the code aspect or if this seems like more of a bug and you don't want to remove the app, I'd recommend reaching out to the app developer directly to look into this further. Because they created the app, they'd know about it better than anyone.
If you didn't use an app to set up the pop up, please let me know how you set it up and we can take another look into this for you!
Nick | Community Moderator @Shopify
- Was my reply helpful? Click Like to let me know!