this happens on wikidata, as well as master.
- I have an item with spanish description "Film von Diao Yinan (2014)"
- edit the description to remove the year
- click save
- undo the edit (thus re-adding the year to the spanish description)
- I am back on the item page, but the spanish description shows the previous version before undo. (e.g. no year)
If I click edit, then it shows the correct version.