Okay, I tried to debug the problem but without success. The screenshots are not showing up inside the index-v1 json file.Other localized data like the feature graphic is listed correctly (which explains why it is displayed correctly inside the client).
The server side code looks fine to me, but I cannot test it, so I’m not absolutely sure. One last step I’ll try is renaming the screenshots without underscores. If this does not work I’ll have to drop this issue