What causes Zalgo text to do this?
<p>Before jumping the gun on anything, yes, I have looked at this <a href="https://stackoverflow.com/q/6579844/5351192">Q/A</a> already. </p>

<p>I've recently discovered the Twitter user '<a href="http://twitter.com/Glitchr_" rel="nofollow noreferrer">@Glitchr_</a>', and have been looking through some of his tweets and some of the "art" he makes. Something that caught my eye as I was scrolling down the page were these two things:</p>

<p><a href="https://i.stack.imgur.com/GWNAC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GWNAC.png" alt=""></a></p>

<p>Now, you may think, <em>wow, backwards text. The title must be formatted like that.</em> 
But if you look into the HTML, here's what you find (Highlighted Text):</p>

<p><a href="https://i.stack.imgur.com/UK90B.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UK90B.png" alt=""></a></p>

<p>The second thing I found was this:</p>

<p><a href="https://i.stack.imgur.com/XoDpG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XoDpG.png" alt=""></a></p>

<p>Some of the zalgo text also messed up the dates and somehow reversed it as shown.</p>

<p>So as stated in the title, <strong><em>What causes Zalgo text to do this?</em></strong></p>