Hi Jira Community and Jira Misc Workflow Extensions team,
to satisfy our customer's request to have custom fields that can also contain attachments (therefore not using the "Attach" command), it was necessary to create multi-line text fields with the render set to [Wiki Style Renderer] (in "Description" field style, so to speak), so as to have the "Files & images" function to upload files and "bind" them to the respective field:

Subsequently we implemented an automation with the JMWE app with which, once a type A ticket has been closed, we create a type B ticket by overturning many of the former's fields on the latter, among which there are the custom fields for the attachments (highlighted in yellow) mentioned above.

This allows us to create new tickets by inheriting the uploaded attachments in the respective fields (the Attachment field highlighted in blue is necessary for this operation).
However lately (I would say from the beginning of April), this work-around seems to no longer work because, once the tickets have been created, the previews of the files inserted in the fields in question are not visible:

It happened even before, every now and then, but reloading the page the problem disappeared.
Now, however, not even doing Ctrl + F5, or clearing the browser cache, can you return to the previous situation. Previews were needed to instantly know which attachment belonged to which field.
We also use Nunjucks scripts to retrieve the aforementioned fields and correctly flip them into those of the new ticket:

, but even in this way we no longer see previews, for a few days.
We don't know if it is a page rendering problem that takes too long to load the previews of the files, or if the numerous automations present somehow burden the loading of the ticket.
If anyone from the JMWE team knew more, it would be of great help to us.
Thanks,
Fabio