Am Montag, 19. Juni 2023, 13:53:02 CEST schrieb Gerion Entrup via ntg-context:
> In this minimal example everything works. However, in my real document
> the subfigures have enormous space between them so just two pictures are
> visible (see the attached png).

I finally found the cause. I had these lines in my header:
```
\setupcaptions[minwidth=0.95\textwidth,
               way=bychapter,
               prefixsegments=chapter]
```
In the new context, this seem to apply to all captions, while in the old
context, it seems to apply only to those captions that are not specified
otherwise.

Best
Gerion