iframely still active after uninstall

Installed plugin to test on a site with issuu naked links in post content.

Preferred the native WP embed (the iframely put the issuu content into a black bg which I cannot edit).

Deactivated and then even uninstalled the plugin, but issuu urls are still being intercepted and embeded from cdn.frame.ly src. Why? Are you storing some settings in the DB?

Only way round this issue is to hook embed_oembed_html post embedded and rewrite the html injection code by calling wp_oembed_get() function.

https://wordpress.org/plugins/iframely/