I remember someone posted about this some while ago, but I can’t find the post.
I also wanted to file a bug report online, with some modified screenshots illustrating the proble, but couldn’t find an upload button here https://apoapsisstudios.atlassian.net/secure/CreateIssueDetails.jspa
This happens whenever you have a “curve” and a fork nearby. Instead taking the correct (yellow) turn, the driver cuts the corner, even waiting for any oncoming vehicle, and causing an unnecessary jam.
Ah, now I get you. You’re right, it seems that it was disabled in Jira. Until a few months ago it was still possible to attach files but now that’s gone.
I think the only way possible would be to upload the files somewhere else and just add the link in bug description. A bit annoying though if you always have to go to two sites.