2 Concurrent Dialup VPN dropped

Hi!

I have 2 differents customer who have a Dialup VPN to connect to our Cloud platform.

I noticed that when costumer B establish the Dialup VPN the customer A got dropped.

Can someone explain to me why and how can i fix this?

They are on different subnet but on the same firewall FVM00

Customer A 128.2.1.0/24

CLOUD A 192.168.20.10/32  (interface port A)

Customer B 172.254.60.0/24

CLOUD B 192.168.43.10/32 (interface port B)

Can someone explain to me why?

Is it possible that i need to add set-add-route disable on both VPN? i need to do that on Customer and Cloud firewall Phase1?

P.s: They have Dialup because they are both on 4G failover SIM with natted IP