TDE Compression

Litespeed Enterprise 8.9.8.48
SQL Server 2017 CU31 (14.0.3460.9)

Hi,

We've been implementing TDE in non-production servers and so far have no been able to get the same high compression levels with with non TDE databases. .

The documentation for Litespeed 8.9.8, says the recommended compression level is 1 when backup databases that are using TDE.
support.quest.com/.../compression-levels

Following documentations recommended compression level of 1, We are seeing less than 1 % compression instead of more than 70% compression without TDE.

Is this expected with Litespeed, or are there other ways of using Litespeed settings to get compression levels of greater than 70% with TDE?
Thanks,
Brian