Images I uploaded with repeating not showing in web preview

1. What is the issue? Please be detailed.
I installed ODK central on AWS and used it to collect data. In the form design I used repeated groups to take multiple snapshots. a total of about 9000 records were collected, each with about 6 images uploaded using the repeating group. I also took a few other images from the form, but not with repeated groups.

Auditors are reviewing the data online using the edit link in the Submission detail page for each record.
All data, including images which were not taken in repeated groups display. But the images taken using repeated groups do not show at all

2. What steps can we take to reproduce this issue?

3. What have you tried to fix the issue?
I tried downloading the whole data to my laptop so that the review can be done offline. but it is taking ages to download

4. Upload any test forms or screenshots below.
There is no error displayed so I am not sure which screenshot will be useful

I will be happy for any advice that can help the auditors see all images.