<!DOCTYPE html>
<style>
  #block { page-break-inside: avoid; }
  span { padding-left: 1px; }
  #columns { columns: 0px; column-gap: 0; )
</style>
<body>
  There word 'Hello' should appear below.
  <div id="columns">
    H
    <div id="block">
      <span> <!-- Just need an inline with nonzero width -->
        <div style="padding-left: 1ch">&nbsp;ello</div>
      </span>
    </div>
  </div>
</body>