When a user wants to prefill e.g. Categories in settings it disappears after saving. It adds that string to upload, but the user cannot see it in the Settings window, which is confusing, since the user doesn't know what he/she has previously saved and may cause trouble, if the user needs to change these fields.
Way to reproduce:
Tools: Settings: General: Other: Categories
Fill the field with whatever string e.g. "Files by XY;"
Hit the Save button
Repeat step one - you can see the field categories are empty. The string which the user has filled here and saved should stay in the window.
Priority 2
When a user wants to prefill e.g. Categories in settings it disappears after saving. It adds that string to upload, but the user cannot see it in the Settings window, which is confusing, since the user doesn't know what he/she has previously saved and may cause trouble, if the user needs to change these fields.
Way to reproduce:
The same problem is happening with fields:
Users reporting this issue: https://commons.wikimedia.org/wiki/Commons_talk:Vicu%C3%B1aUploader#Bugs_2