This is related to bug #48924 and came up while working on VE's new media dialog.

Symptoms :

1. Parsoid seems to ignore adding an alt attribute to an image that had no alt attribute previously -- the image still has no alt attribute post-save, even though the DM/CE in VisualEditor were both updated properly.

2. When the alt string in 'alt=something' is changed, the resulting wikitext post-save is produced without the 'alt='

So, an original wikitext:

[[File:Someimage.png|thumb|265x265px|some caption|right|alt=some alternate text]]

After editing the alt property in VE, the wikitext post-save becomes:

[[File:Someimage.png|thumb|265x265px|some caption|right|some alternate edited text]]

Version: unspecified
Severity: normal