How to track traffic consumption through Unifi Controller?

Question

network hardware

Good afternoon colleagues, such a situation.
Network:
Ubiquiti UniFi Security Gateway 4P (Hereinafter "4", DHCP server) and UniFi Switch 48 (Hereinafter "48") in the server room, connected to the recently purchased Cisco SF300-24. VLAN created on port (48). The essence of the problem, up to this point, such a scheme worked for everyone and I saw traffic and consumption and could reach everyone (ping) and see traffic consumption (activity) in the Unifi Controller. In this case, either some kind of cisco technology does not allow this, or I don’t understand something.
Prompt in what there can be a business. Other things being equal, with blunt switches, this problem does not arise.