2.0 theme not too responsive when product title too long

I just find out when the product title is too long, the responsive theme is not responsive in smart phone (or drag your desktop web browser to the smallest). You will need to slide the screen left and right to view the product. You can try this, create a title for 40 character long including space. Then go to product page open by smart phone ~5inch. You will see the title is out of the border which making the theme is not responsive.

Anybody got idea how to fix this?