[Uppy] Same debug information is displayed for all images

[MrMusic]

Steps to reproduce the issue

Use 'Multiple new' Set 'Debug mode' on Upload multiple images Check the displayed debug information for each imnage

Expected result

Each image has different debug informations: file name etc.

Actual result

The same debug information is displayed for all images

[Elfangor93]

This is because currently messages like debug output is stored in the session. I guess there is a problem in the session management such that the wrong messages are taken when multiple requests reach the server.

[Erftralle]

I can confirm this issue. The problem seems to me the use of the same unique identifier (by using the uppy upload id) for identifying the modal popups within the debug buttons for the different image files. The division id's must be unique.