https:// ibb.co/ PYkwHdn,
https:// ibb.co/ WBBYKq2,
Example - imgur . com.
I have enabled https only in chrome in the above case, but still it is showing like this due bsnl interfering. Although this does not happen everytime, but occasionaly.
If i have not enabled https in chrome, then i will see bsnl ad instead of this warning.