Uncaught (in promise) Error: Node dont have an ix
at HTMLElement.getBackwardNode (uprtcl-documents.es5.js:3790)
at HTMLElement._callee27$ (uprtcl-documents.es5.js:4121)
at tryCatch (runtime.js:68)
at Generator.invoke [as _invoke] (runtime.js:299)
at Generator.prototype.<computed> [as next] (runtime.js:121)
at asyncGeneratorStep (uprtcl-documents.es5.js:503)
at _next (uprtcl-documents.es5.js:505)
at eval (uprtcl-documents.es5.js:505)
at new Promise (<anonymous>)
at HTMLElement.eval (uprtcl-documents.es5.js:505)