We recently ran into some issues removing Shopify's native email subscription popup from our filter. After searching, we found that we needed to remove some code in the theme.liquid section and the popup was removed. However, it seems to have left a grey film/filter over our homepage. It can be removed by simply clicking anywhere on the screen, however we're stumped as to how to remove it entirely.
We did recently move to Klaviyo, however the problem persisted before it's integration. When Shopify's native popup existed, it darkened the homepage to make the popup more pronounced. We believe we've removed the code to clear the popup, but not the darkening of the screen.