title: VS2019 Find enters endless loop
body: <p>I try to find a certain string in my xaml and cs files.</p>
  
  <p>So I press cntrl-F and get this pop-up in the right top, enter  the string and send it on its way through all the project files.</p>
  
  <p>When it needs to switch from .cs file to .xaml files, the find pop=up changes to a "stand-alone" popup and starts looping endlessly, while flashing the string wildly in the entry field.</p>
  
  <p>I can only abort VS via the task manager. No clicking on VS will stop it.
  What is going on here?</p>
  
  <p>Never did that in VS2017...</p>
  
  <p>But maybe it's an error in the code on my part. I dunno...</p>
  
  <p>Any suggestions?</p>
  
  <p>btw: does this in another project of mine too, which I did not touch for months....</p>