Yesterday I noticed one branch, flipping over, now 2more doing the same thing? What happened?
Nothing - out side grows you will find out has many issues and “strange” things happen to pants because of mother Nature
look’s like it grew pretty fast in the stretch .and the branch is a little small … i would prop it up or use plant stake’s around the out side 4-3 places . and use some twine to support it … Hammer
I was going to say the same thing as @Hammer.
There’s only one thing wrong…there not tied back. …lol 
Will