Ambox templates are used on pages other than the main namespace - notably template, categories and talk to provide information to editors.
For example talk pages:
https://en.m.wikipedia.org/wiki/Talk:Sandwich#/issues
{F23398928}
When bucketed with the new treatment
e.g.http://reading-web-staging.wmflabs.org/wiki/Talk:Sandwich
The issues are not accessible.
{F23398974}
It also seems our recent changes have caused a regression with the display of these issues. Note well that this regression was fixed in T199005#4409931.
{F23398853}
= acceptance criteria
[] Restore the "about this page" link for template/talk and category namespace. A/B test should not apply here.
[x] Do not render issues if their html is an empty string.
= sign off notes
As part of sign off, we'll want to work out the long term plan for dealing with these type of amboxes. Options involve keeping both versions around; redesigning these amboxes or displaying them (despite the impact on appearance)