MWAN3 rules not respecting CIDR range

I have MWAN3 working and load-balancing between my two WANs (Ubiquiti Nano and LTE). Policies are working fine.

The issue arises when I enter the rules. My network is on the subnet. If I enter a rule with source IP, the traffic off a device goes over either WAN.

If I enter an exact IP ( for example), the traffic from that device goes over the proper WAN.

Even putting the rules with source at the top makes no difference.

Without making a rule for every device, is there a solution for this?

Can you show all the rules?

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I know people prefer text but I didn't have time to search for the command to export the MWAN3 rules.