<p dir="auto">When rapidly erasing lines from a scrolling text box, the text that should be hidden due to it being outside of the box incorrectly appears.</p>
<p dir="auto">To reproduce:</p>
<ol dir="auto">
<li>Open Flutter gallery</li>
<li>Select "Material"</li>
<li>Select "Text Fields"</li>
<li>Type many lines of short text in the "Life story" section (at least 6, the more the better)</li>
<li>Rapidly erase the lines. The first few hidden lines will appear as the text scrolls up.</li>
</ol>
<p dir="auto">After several lines, including some blank lines, are inserted in a multiline TextField, press and hold the delete key. When the blank lines are deleted the viewport's text contents suddenly and temporarily appear above the text field.</p>
<p dir="auto">See <a href="https://youtu.be/Nx0Go-4oPRg" rel="nofollow">https://youtu.be/Nx0Go-4oPRg</a></p>