Created attachment 455347 [details]
video of resizing textarea on Chrome and Safari

I can't see this bug on Chrome. But on Safari, when a textarea has more than 12px of padding, resize functionality doesn't work.  
Even in 12px padding, it's hard to resize because it feels like the drag area is small and I can only resize it if I try multiple times to find the exact spot.  
With 16px padding (1rem) it's impossible to resize.
Here's a CodePen link to try: https://codepen.io/saadeghi/pen/RwxGjXe?editors=1000  

I also attached a video of the issue