title: failedtoperformactiononhiddencontrolexception despite the textbox being clearly visible
body: <p>I have a wpf application which has a text box in which I can write a text value to just fine the first time around. If I exit the window the text box is in and then reopen that same window the box can no longer be found by the testing, despite being enabled, and clearly visible on my screen. </p>
  
  <p>I looked at the values of the box, the x,y = -1,-1 and height,width are also -1,-1 which is confusing seeing as the box is completely visible. </p>
  
  <p>I know what the text in the box will be, is it possible to search for a text box with that as a workaround?</p>
  
  <p>I'll keep researching this but any feedback is appreciated :)</p>
  
  <p>EDIT: Upon further study there is a second field on top of the original field providing an initial explanation as to what the box is for ("Enter field value"). </p>
  
  <p>Maybe this is a wpf error?</p>