Hi @VerleyAltamirano,
What version of Survey123 Connect and field app are you using?
Is the second user refreshing the Inbox and editing the survey that the first user created? If so, the images should not be deleted if the survey is edited from an existing record that had images. It sounds as if the record in the layer if being overwritten, not updated. This could happen if both uses had the same record in their Inbox at the same time, and did not refresh/update after the first user had submitted.
Can you provide a copy of your xlsxform and any further details and instructions, and even screenshots, so we can take a closer look and understand the complete workflow.
Regards,
Phil.