I am using a single form with a field multiple line text.
As you can see from the photos i have width: 360 px and height: 50px.
The result is i also get line-height:50 px !
This happened after the update.
such css things are hard to find and fix
a moto of sc should be Turn datainto insights if you have time left after fixing all the bugs. 
you might try fixing it a the global style level, or inject css on an event.