When adding several attachments at the same time to a task, they do not get uploaded if you navigate away from that task. Please fix this bug. This is an issue on Firefox desktop, and possibly other environments.
Hey @Tim5! I have just tried to reproduce your issue on both Firefox and Chrome but it seems to be working fine for me. These troubleshooting steps might help to solve your issue: https://asana.com/guide/help/faq/connectivity#gl-troubleshooting. Let me know if the problem persists!