this is my case. i had an app which i was using to get data from my database using php and mysql which i mascaraed with jason file. one of the objects in the array contained HTML data. for example:this is how my object looked like. let me give you an example i was using, i was using this example:$sce which takes me to

on this plnkr contains a file called test_data.json,
"htmlComment": "<i>Yes!</i> Am I the only other one?"

but when i got the JSON back, it looked like this:
"htmlComment": "<i>Yes!<\\/i> Am I the only other one?"

my solution, i need to add the header:
header("Content-Type: application/json; charset=UTF-8");

hope that helps