ex2200 radius end 2 voip

Please help, I try to deploy a radius on ex2200, but there was a problem if there are two IP phones connected to the port, then one of these phones is fading.
Only one mac address is visible on the port. At the same time with computers such problems do not arise.
config:
set access radius-server 192.168.0.2 secret "1234"
set access radius-server 192.168.0.3 secret "5678"
set access profile radius_lan authentication-order radius
set access profile radius_lan radius authentication-server 192.168.0.2
set access profile radius_lan radius authentication-server 192.168.0.3

set protocols dot1x authenticator authentication-profile-name radius_lan
set protocols dot1x authenticator interface radius_port supplicant multiple
set protocols dot1x authenticator interface radius_port mac-radius restrict
set protocols dot1x authenticator interface radius_port server-reject-vlan vlan.20

set interfaces interface-range radius_port member ge-0/0/21

set ethernet-switching-options voip interface ge-0/0/21.0 vlan vlan.30

information on the port before applying the configuration:
run show ethernet-switching table interface ge-0/0/21
Ethernet-switching table: 6 unicast entries
VLAN MAC address Type Age Interfaces
vlan.10 * Flood - All-members
vlan.10 00:0a:6b:03:1a:c3 Learn 1:22 ge-0/0/21.0
vlan.10 00:0a:6b:03:1a:ed Learn 1:28 ge-0/0/21.0
vlan.10 50:46:5d:70:90:75 Learn 0 ge-0/0/21.0  PC
vlan.10 54:04:a6:a5:1a:85 Learn 0 ge-0/0/21.0  PC
vlan.30 * Flood - All-members
vlan.30 00:0a:6b:03:1a:c3 Learn 0 ge-0/0/21.0   IP phones
vlan.30 00:0a:6b:03:1a:ed Learn 0 ge-0/0/21.0  IP phones

results

run show dot1x interface ge-0/0/21
802.1X Information:
Interface Role State MAC address User
ge-0/0/21.0 Authenticator Authenticated 00:0A:6B:03:1A:C3 000a6b031ac3
ge-0/0/21.0 Authenticated 50:46:5D:70:90:75 50465d709075
ge-0/0/21.0 Authenticated 54:04:A6:A5:1A:85 5404a6a51a85
run show ethernet-switching table interface ge-0/0/21
Ethernet-switching table: 3 unicast entries
VLAN MAC address Type Age Interfaces
default * Flood - All-members
vlan.10 * Flood - All-members
vlan.10 50:46:5d:70:90:75 Learn 0 ge-0/0/21.0
vlan.10 54:04:a6:a5:1a:85 Learn 0 ge-0/0/21.0
vlan.30 * Flood - All-members
vlan.30 00:0a:6b:03:1a:c3 Learn 0 ge-0/0/21.0

run show lldp neighbors
Local Interface Parent Interface Chassis Id Port info System Name
ge-0/0/23.0 - f0:1c:2d:bd:ba:c0 ge-0/0/47.0 ATC3
ge-0/0/21.0 - 192.168.30.20 WAN PORT Tadiran
ge-0/0/8.0 - 192.168.30.28 WAN PORT Tadiran
ge-0/0/16.0 - 192.168.30.112 WAN PORT Tadiran
ge-0/0/21.0 - 192.168.30.175 WAN PORT Tadiran (disappeared)

Where did I make a mistake?