Text stopped calculating its size in 5.2

So I have a little chat component and I use RectTransform with Text to show them in Scroll Rect.
After updating to 5.2 all those objects are reporting width and height of 0.
Because of this chat stopped working - all strings are 0 in size and are not visible.

How do I make them calculate their sizes correctly?

 

Still need help.
Here are my settings:

The overlord Chat object:
Ig0fGl9.png

The content object in that Chat:
R7UWWdu.png

The single line in chat:
R7UWWdu.png

The code that adds line to chat:
q1I2kIZ.png

What I want:
A chat like window where lines appear on the bottom of the window. After a new line appears, the previous one is shifted up. This was working perfectly in 5.1


Now in 5.2 this is broken. All lines are 0 width and height and are stuck on the bottom, invisible. If I change their size manually to something, I can see them and they behave normally. How do I make Texts calculate their sizes correctly?

 

No, I have one canvas. Someone help please

 

I localized the error to the fact that I use Scroll Rect. Without it the lines format correctly, but do not scroll.