.input-group-lg causes textarea's height to shrink to a single line

Created by: wedi

In Bootstrap 3.2.0 adding .input-group-lg to a input group causes textarea's height to shrink to a single line. Adding height: auto; to the textarea removes this error.

See #8672 (closed)

Test it with:

<!-- everything ok: -->
<div class="form-group">  
  <div class="input-group">
    <div class="input-group-addon"><span class="glyphicon glyphicon-align-left"></span></div>
    <textarea name="message_ok" id="message_ok" class="form-control" rows="6" placeholder="Your message"></textarea>
  </div>
</div>
<!-- wrong input height: -->
<div class="form-group"> 
  <div class="input-group input-group-lg">
    <div class="input-group-addon"><span class="glyphicon glyphicon-align-left"></span></div>
    <textarea name="message" id="message" class="form-control" rows="6" placeholder="Your message"></textarea>
  </div>
</div>

Off topic: Is there a way to top align the glyphicon?