Just testing frontend widget changes via customizer and I am not even able to change the title. Ajax response says
There is also a notice http://prntscr.com/kk518f but there are no errors anywhere.
and if I read that correctly it says to stop if count of captured options is bigger than 1 meaning that it somehow "sees" a duplicated option for the title.
I was not able to find any references to this. Any help is appreciated.