Appears to be working in Firefox but at least Chrome & Safari are broken. Should be a really recent regression so very few possible changes to blame...

Easiest repo: the todo list on our homepage.

var tag = element.type;
  validateDangerousTag(tag);
  this._currentElement = element;
  this._tag = tag.toLowerCase();
  this._namespaceURI = null;
  this._renderedChildren = null;
  this._previousStyle = null;
  this._previousStyleCopy = null;
  this._nativeNode = null;
  this._nativeParent = null;
  this._rootNodeID = null;
  this._domID = null;
  this._nativeContainerInfo = null;
  this._wrapperState = null;