It’s a known bug:
https://mailman.ntg.nl/pipermail/ntg-context/2016/086926.html

You can always test your code with latest standalone on
http://live.contextgarden.net/

On 02/01/2017 04:43 PM, Lawrence Bell wrote:
> I'm having some difficulties with nested itemgroups. I've produced a
> minimal working example as follows.
>
> \defineitemgroup
>   [test] [symbol=n]
>
> \starttext
>
> % \startitemgroup
> %   \startitem
> %     \startitemgroup[test]
> %       \startitem
> %         ...
> %       \stopitem
> %     \stopitemgroup
> %   \stopitem
> % \stopitemgroup
>
> \startitemgroup
>   \startitem
>     \startitemgroup
>       \startitem
>         Lorem ipsum
>         \startitemgroup[test]
>           \startitem
>             dolor sit amet,
>           \stopitem
>           \startitem
>             consectetur adipisicing elit.
>           \stopitem
>         \stopitemgroup
>       \stopitem
>     \stopitemgroup
>   \stopitem
> \stopitemgroup
>
> \stoptext
>
> I would expect items in the [test] itemgroup to be numbered 1, 2 but
> instead they are both 0. I have also found out that, bizarrely,
> uncommenting the first itemgroup fixes the issue. This is the behaviour
> I get on the TeXLive 2016 version of ConTeXt, I don't have the latest
> minimals installed to test.
>
> Thanks in advance for any help with this matter!
>
>

> ___________________________________________________________________________________
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>
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> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________