I’m using Flexible Posts Widget plugin. It has another issue with SiteOrigin Builder on ‘hooks’, but still you may debug passed form-values.
BTW, I’ve made a simple patch for this issue with help of $.deparam method from jQuery BBQ Plugin.
/*
* jQuery BBQ: Back Button & Query Library - v1.3pre - 8/26/2010
* https://benalman.com/projects/jquery-bbq-plugin/
*
* Copyright (c) 2010 "Cowboy" Ben Alman
* Dual licensed under the MIT and GPL licenses.
* https://benalman.com/about/license/
*/
// borrowed only $.deparam method
(function($){$.deparam=m=function(L,I){var t=decodeURIComponent,K={},J={"true":!0,"false":!1,"null":null};$.each(L.replace(/\+/g," ").split("&"),function(O,T){var N=T.split("="),S=t(N[0]),M,R=K,P=0,U=S.split("]["),Q=U.length-1;if(/\[/.test(U[0])&&/\]$/.test(U[Q])){U[Q]=U[Q].replace(/\]$/,"");U=U.shift().split("[").concat(U);Q=U.length-1}else{Q=0}if(N.length===2){M=t(N[1]);if(I){M=M&&!isNaN(M)?+M:M==="undefined"?h:J[M]!==h?J[M]:M}if(Q){for(;P<=Q;P++){S=U[P]===""?R.length:U[P];R=R[S]=P<Q?R[S]||(U[P+1]&&isNaN(U[P+1])?{}:[]):M}}else{if($.isArray(K[S])){K[S].push(M)}else{if(K[S]!==h){K[S]=[K[S],M]}else{K[S]=M}}}}else{if(S){K[S]=I?h:""}}});return K};})(jQuery);
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getFormValues: function(formSelector){
if(typeof formSelector === 'undefined') {
formSelector = '.so-content';
}
var $f = this.$(formSelector);
$f.wrap('<form></form>');
// var data = $f.parent().serialize();
var data = $.deparam( $f.parent().serialize() );
return data;
},
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