Sections Disappearing when Customizing


#1

All of the Sudden when trying to customize in Customizer, all sections disappear. they come up for about 2 seconds , but then when the live preview loads, the sections on the left hand side disappear. ( See attachment below)

http://postimg.org/image/v8zh2r0dx/


#2

I don’t think this is a theme issue. It has no reason to be.
Could you please try disabling your plugins and check after that?