error in the console in edit mode

[szydan]

angular.js:12520 Error: [ngModel:numfmt] Expected `10` to be a number
http://errors.angularjs.org/1.4.8/ngModel/numfmt?p0=10
    at angular.js:68
    at Array.<anonymous> (angular.js:21977)
    at Object.ngModelWatch (angular.js:25489)
    at Scope.$digest (angular.js:15888)
    at Scope.$apply (angular.js:16160)
    at done (angular.js:10589)
    at completeRequest (angular.js:10787)
    at XMLHttpRequest.requestLoaded (angular.js:10728)

In edit mode possibly caused by the fact that input for Events number limit
is of type number but initially set to "10" as srtring
Seen it on 5.4.3-2 kibi demo