Ecency is having a very annoying thumbnail bug. All my posts had different images, but regardless of that, Ecency is showing the same thumbnail for every post.
It is not happening only on my account, a friend of mine, 
I did notice it by myself but I thought I was being dumb and it was my fault, but apparently, I am not the only one.
All of my last 4 posts had different images, but they defaulted to the same thumbnail.
On this one I am checking the thumbnail before posting to make sure it is not the same as the other ones:
Edit: Ok, by manually clicking on the thumbnail when creating a post it made the thumbnail for this one post go to the correct one. The behavior before was that the first image of the post would automatically become a thumbnail. Seems like for now I have to manually open the setting of the post and select it.