Steps to reproduce this issue:
Open the website: https://report.bugs.mojang.com/servicedesk/customer/portal/10/group/10/create/20 in the google chrome browser
Create a report and upload some screenshots, or comment the screenshots.
Observe
Expected results:
In the reports and comments you should be able to upload multiple screenshots and videos.
Actual results:
You will not able to upload multiple videos or screenshots
Update: This issue was happening for me yesterday