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Selected Knockout.js list is unstable on ios

I have several selection fields that act randomly in ios. I am running cordova 1.8.1 and have a knockout.js application running on my page. When I select an item in a product selection item, it is selected and also performs all other items in the list. Now, as far as I can tell, the correct element is selected and reported when I submit the form, but it looks really very bad for the user and can be very confusing. I am doing something unusual, here is the code:

<select class="dropdownList1" style='width:35%;left:28%;position:absolute;' data-bind="value:ContactUsForm.Month,options:ContactUsForm.Months,optionsCaption: 'Month'"></select>

But here is the result when I choose 7 per month:

enter image description here

muti. , iOS, , Knockout . , "" , ios, , "done".

+5
1

, . ContactUsForm.Months , , , , . . RP Niemeyer Knockout.js Gotcha # 3 - All Bindings Fire Together .

, , , . options isolatedOptions. ( value options isolatedOptions.)

<select data-bind="
    isolatedOptions:ContactUsForm.Months, optionsCaption:'Month', 
    value:ContactUsForm.Month"></select>
+5

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