sometimes the CPE port remains in down state

configured L3 service
1 CPE with 2 UNI ports
2 sub interfaces (UNI-ID) on each port
remote subnet behind the interfaces

CE 1 ens5
IP UNI ID VLAN Address
1111 10 110.1.1.1/29
Subnet Gateway
111.1.1.0/29 110.1.1.6

IP UNI ID VLAN Address
1112 11 110.1.1.9/29

CE 1 ens6
IP UNI ID VLAN Address
1121 20 110.1.2.1/29

IP UNI ID VLAN Address
1122 21 110.1.2.9/29
Subnet Gateway
111.1.2.8/29 110.1.2.14

sent traffic from 110.1.1.10 to 111.1.2.10 failed
didnt see in cpe table:21 the remote subnet network on 111.1.2.10 (111.1.2.8/29)

the following error is shown in the karaf.log
failed due to Interface information not present in config DS