message: prevent pills being applied multiple times when rerendering
diff: @@ -214,7 +214,13 @@ module.exports = React.createClass({
  // update the current node with one that's now taken its place
  node = pillContainer;
  }
  - } else if (node.nodeType === Node.TEXT_NODE) {
  + } else if (
  + node.nodeType === Node.TEXT_NODE &&
  + // as applying pills happens outside of react, make sure we're not doubly
  + // applying @room pills here, as a rerender with the same content won't touch the DOM
  + // to clear the pills from the last run of pillifyLinks
  + !node.parentElement.classList.contains("mx_AtRoomPill")
  + ) {
  const Pill = sdk.getComponent('elements.Pill');
  let currentTextNode = node;
  