LiteSpeed Activity field "Progress, %" doesn't display data during restore process, only 0 and 100 after end of restore.
WORKAROUND
Run the following LIteSpeed procedure in SQL Management Studio:
exec xp_slsreadprogress
@database='DB_name'"
This will show you the correct progress of the restore
STATUS
The issue has been fix in LiteSpeed version 8.8. The latest version can be downloaded here.