Do icons work strangely?

Question

css

Icons often disappear...


After a few refreshes, Code appears



.

<span class="social-icons mt__1"><span class="fa-stack fa-stack2"><a href="#"><i
          class="fas fa-circle fa-stack-2x facebook"></i> <i
          class="fab fa-facebook-f fa-stack-1x"></i></a></span> <span class="fa-stack fa-stack2"><a
        href="#"><i class="fas fa-circle fa-stack-2x twitter"></i>
        <i class="fab fa-twitter fa-stack-1x"></i></a></span></span>

Answer 1

The problem is in the cache. There are no other reasons.