The same problem occurs on Ubuntu 20.04. Adding the quirk solved the problem for me as well.
Bus 006 Device 004: ID 152d:0562 JMicron Technology Corp. / JMicron USA Technology Corp. External -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1584557 Title: Seagate external drive causes SCSI bus resets when UAS enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1584557/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
