items.addItem creates phantom tag „_DYNAMIC_“

When adding an item by code

  type: 'Switch',
  name: offlineItem,
  label: 'Test',
  groups: ['gTest'],
  category: 'error',
  tags: ['Point']

the item gets added as expected but additionally a non-semantic tag _DYNAMIC_ also gets created.
What‘s wrong with my itemConfig?

Everything is ok and seems to work as expected. Dynamic item tag is being added to easily separate script-created items. Look here: items - Documentation