Why is the sandbox disablen when using the firewall only?

Why is the sandbox disablen when using the firewall only? If I use another AV than Comodos and enable the sandbox, would there be any problems for example if the AV detects a malware and wants to remove or qarantine it, and Comodo sandbox sandboxes that same malware, what happens then?

CIS has 3 main components.

  1. Firewall
  2. Defense+
  3. AV

Sandbox is part of Defense+. So if you use the firewall only, sandbox does not come into the picture.

I found that there are no issues in using another AV together with the firewall and Defense+ (including sandbox).

Cheers

Hmmm…
Other antivirus has it as a part of the antivirus, like avast.
Which are the differences on being in one part of another?