List of steps to reproduce (step by step, including full links if applicable):
- Open article: https://pl.wikipedia.org/w/index.php?title=Wikipedysta:EcceNux/brudnopis&oldid=64678454
- Edit with VisualEditor.
- Select 3 cells in 2nd row.
- Merge (pl: "Połącz").
What happens?:
Whole table disappears.
In general all columns with cells you select disappear. If you select first two cells (in one row!) then first two columns disappear.
What should have happened instead?:
Should merge cells.
Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc:
Chrome 94.
Firefox 93.0b9 (dev).
Windows 10.
