Smush Creates insecure links which break SSL

Hey Guys,

When Smushing images I've found that it's created some alternate image links which cause the SSL to become insecure. Has anybody else had this happen to them? Is there a possibility it isn't smush which is creating these links and it's another plugin?

Most of the URLs end in e - something (e.g. number-3-e1500509667486.png)

Do you have recommendations on how to fix the secure links? I've installed SSL Insecure Content Fixer so hopefully, that should do the job.

However, i'd like to hear your thoughts.