Don’t know if I was in http or not for sure, but I think I was in https: I was in a thread and tapped reply with quote, got no response beyond the forever spin.
Double tapped it and got the dialog window...still sans editing controls. When I hit reply, it took its sweet time, but ultimately posted my response.
How:
1. I click the little content warning icon in the top right on Opera to open it.
2. I click the unblock button to bypass it.
3. I reload the page.
4. Experience
Hunting down the http references in this beast should fix these issues. Those are mainly what I need to find and change. Some are very complicated and generated via code so grepping the database and code for them misses a lot of them.