The bug exists in `cawiki (wmf.14)` and testwiki (wmf.15`). The user talk pages to try is: https://test.wikipedia.org/wiki/User_talk:Zilant32 or https://test.wikipedia.org/wiki/User_talk:Zilant17
1. Add text to Flow board description. Click on 'Publish description' - the following errors will be displayed in the Console and the action of saving changes seems to be unfinished:
```
Query.Deferred exception: Cannot read property '$content' of undefined TypeError: Cannot read property '$content' of undefined
at mwFlowUiBoardDescriptionWidget.oo.EventEmitter.emit
jQuery.Deferred exception: Cannot read property 'error' of undefined TypeError: Cannot read property 'error' of undefined
```
2. Click 'Cancel' and confirm in the popup that edits should be dismissed - the edits would be, in fact, saved.