Sonicwall Content Filtering - Exclude devices by IP Range not working

Hi Guys

I have  Sonicwall NSA220 running Firmware: 5.9.0.7-17o.

I've tried to configure an IP address range to bypass the CFS but it doesn't seem to be working. The devices are still blocked. I'm wondering what I've configured incorrectly.

Here is how I've set it up:

1. CFS is enabled.

2. Default Content Filtering rule is configured in - Firewall>App Rules> "Default Content Filtering Rule".

3. - Block list/Allow list is configured  in Firewall>Match Options>1. Block List, 2. Allow List.

For the CFS Exclude IP Range I have configured:

1. Network>Address Objects> I created a "CFS Exclude Range" address object and added a range of IP I want to exclude.

 2. CFS> Enable CFS Exclusion List - selected the "CFS Exclude Range Object".

3. Firewall>App Rules> "Default Content Filtering Rule" - Edit>Exclusion Addresses> set to "CFS Exclude Range Object".

What do you guys think, have I configured this correctly? What should I check?

Kind Regards

Aaron