In the blog post you posted, the photos that he took didn't challenge the lens, if you noticed, there's no real contrast in the light sources nor does the examples have any strong by sources or contrast in the back ground.
I noticed that most of my shots that I have learned flare have an extreme contrast in the lighting conditions that caused the lens to reflect.
In this series of photos, I couldn't avoid the Lens flare no matter what I did.
https://youtu.be/HAUb-gKR34A
In this video, I was able to push the lens flare off of the video by zooming in and turning my phone down word. If you note, I was showing a protester and when I got to the end of the video, I could not avoid it and it was a horrible reflection In this video, I was able to push the lens flare off of the video by zooming in and turning my phone down word. If you note, I was showing a protester and when I got to the end of the video, I could not avoid it and it was a horrible reflection
https://youtu.be/nydXvgB7TcE