Lexical version: 0.16.0

Steps To Reproduce

1. create a new table node like:

export class MyTableNode extends TableNode {
  static getType(): string {
    return 'my-table';
  }
...
}

2. it will break all table functions since the LexicalTablePlugin not work correct at the line 135 in bottom image, tableNodes will be empty, so that the TableObserver will not be initialized.