adding an attachment or a comment to a process seems to work as it's possible to switch to form and back to the comment/attachment tab and see both elements + I can see the fil uploaded on the server.
However, none is visible on next steps, is that a bug or do I need to do something special ?
Also, I've read some about the attachment field, makes no sense that its value can't be displayed in next steps, how should I proceed to make a custom element that will allow to display an url to download the attachment in question ?
Seems that the UI is only calling the task comments not the full process instance comments Activiti/task.js at 6.x · Activiti/Activiti · GitHub if the full comments should be shown then I guess UI should be designed to show what each comment belongs to (i.e. to which task). Same applies to attachments.
Users can still navigate to other tasks and check what was attached or what comments were made on each task. Having the comments only on a task makes the scope clear that is related to that same task. In some cases yeah it might be useful to see all the comments and attachments in one place.