mixed content errors in WordPress admin

Since you released Version: 2.2.2 my WordPress dashboard shows mixed content errors (non https content present)

The source is an image from the update:

https://woody-ad-snippets.webcraftic.com/wp-content/uploads/2019/05/baner-500x150_2.jpg

I disabled the plugin although I understand it’s of little consequence, the error bugged me enough to get rid of the plugin – at least in the short term.