tasker can not access root/data/ directory

case  1 : when i try to unzip archive file located in data/data/com.appxxxx/ , error occurred: file can not be found. even use shell code and checked "root" option, no succeed.
case 2:  set a "file modified" event to monitor one app's log file, i found the data folder is invisible, but "system" folder is visible.

it seems the "data" directory is blocked? or it's a bug?