Bootstrap display errors on input-group wrapper? -

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i'm trying add input-addon form input using bootstrap 3 doesn't display errros correctly. html code:

<label for="inputemail3" class="col-sm-2 control-label">email</label> <div class="input-group">     <input type="text" id="addtax_rate" class="form-control">     <span class="input-group-addon">%</span> </div>

the input group displays correctly without errors, when add has-errors class it, comes this:

what doing wrong? thanks


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