List of steps to reproduce (step by step, including full links if applicable):
- Log in (works a bit differently for anons).
- Edit any page or section e.g. https://pl.wikipedia.org/w/index.php?title=Elisa_Ferreira&action=edit§ion=0
- Enable Realtime Preview.
- Do some change (e.g. remove all wikicode).
- Preview changes (wpDiff button).
What happens?:
No changes are shown. Realtime Preview is enabled.
For anonymous this a bit different. Changes are shown until you press Preview (of Realtime Preview).
What should have happened instead?:
Both should be visible -- diff and Realtime Preview.
Normal, static preview should be hidden (wpPreview button preview). But changes preview (diff) should be visible.
Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.:
This is after pressing "Podgląd zmian" (wpDiff).