background image in Testimonials widget fails to display proerly after new image selected – theme Sidney

background image in Testimonials widget fails to display proerly after new image selected – theme Sidney
Update fails in wide view, displays as a narrow ~30 pixel tal slice of full pic. However, when I manually narrow the width of the browser window, down to phablet/ce;; phone width, BG image appears fins, same as performance in a cell phone.
So, what migth the fail be that supports small page width delivery but fails at wider width?
Image os 1440 pixels wide, same as top of homepage slider pix which work fine.
www.12meter.com/newsite

URL: http://www.12meter.com/newsite