With VT in your screenname, I think you probably have a handle on this that’s not evident in other responses. Few people understand the post-tension concept. I first worked a building with post-tension concrete in 1987. Since then, it has made its way even into home construction as I have PT cables in the slab of my house that was constructed in 2008.
I’ve been in construction for over 40 years. I took a good look at the situation and had a pretty good idea right away what happened.