Summary

When someone edits a Jira issue in a new tab, they are no longer able to upload files. Uploading files without opening a new tab will work as expected.

Steps to Reproduce

1. Navigate to a Jira issue
2. Right-click the "Edit" button and select, "Open Link in New Tab"(or similar)
3. Try to attach a file by dragging and dropping or via a file browser

Expected Results

• File uploaded to issue edit screen

Actual Results

• "An internal error has occurred. Please contact your administrator."
• Jira application logs show 400 error when trying to upload a file via a new tab:

  400	26827	0.024	POST	/rest/internal/2/AttachTemporaryFile?filename=TEST_FILE.jpg&size=24288&atl_token=....
  

• Jira SRE has tested this issue
  Upload within the same browser tab: Successful

  https://czawadka-attachements-addon.atlassian.net/rest/internal/2/AttachTemporaryFile
  	?filename=upload.png
  	&size=111377
  	&atl_token=BRUV-CDXI-MJWM-HQHA%7C399bc91f58b2870bc0a66d3e19d2a57ea4f064c6%7Clin
  	&formToken=ef903e94d1d47504215dd5afefa09cfb19238955
  	&issueId=10012
  

  Upload when user edits the issue in a new tab: Failed

  https://czawadka-attachements-addon.atlassian.net/rest/internal/2/AttachTemporaryFile
  	?filename=upload.png
  	&size=111377
  	&atl_token=BRUV-CDXI-MJWM-HQHA%7C399bc91f58b2870bc0a66d3e19d2a57ea4f064c6%7Clin
  	&formToken=undefined
  

Workaround

• No known workarounds