I think the latest file_contexts is mislabeling /dev/jsflash....
The problem line is
types.fc:/u?dev/js.* -c system_u:object_r:mouse_device_t
It overrides earlier lines:
types.fc:/u?dev/jsfd -b
system_u:object_r:fixed_disk_device_t
types.fc:/u?dev/jsflash -c
system_u:object_r:fixed_disk_device_t
tom