Yesterday, I tried with the latest 1.3 version available. I build VyOS on my own. The linux kernel version is 4.19.131.
This is my configuration without traffic shaping
set interfaces ethernet eth0 hw-id 'f4:e9:d4:84:52:50'
set interfaces ethernet eth1 description 'FIBER'
set interfaces ethernet eth1 hw-id 'f4:e9:d4:84:52:52'
set interfaces ethernet eth1 mtu '1508'
set interfaces ethernet eth1 vif 35 description 'BELL_INTERNET_VLAN'
set interfaces ethernet eth1 vif 35 mtu '1508'
set interfaces ethernet eth2 address '172.16.10.1/24'
set interfaces ethernet eth2 description 'LAN'
set interfaces ethernet eth2 hw-id 'b4:2e:99:84:b6:21'
set interfaces ethernet eth3 hw-id '68:1c:a2:13:48:c5'
set interfaces ethernet eth4 address '172.16.11.1/24'
set interfaces ethernet eth4 description 'WLAN'
set interfaces ethernet eth4 hw-id '68:1c:a2:13:48:c6'
set interfaces ethernet eth4 vif 10 address '192.168.10.1/24'
set interfaces ethernet eth4 vif 10 description 'VLAN10'
set interfaces ethernet eth4 vif 11 address '192.168.11.1/24'
set interfaces ethernet eth4 vif 11 description 'VLAN11'
set interfaces ethernet eth5 address '172.16.12.1/24'
set interfaces ethernet eth5 description 'SERVER'
set interfaces ethernet eth5 hw-id '68:1c:a2:13:48:c7'
set interfaces ethernet eth6 hw-id '68:1c:a2:13:48:c8'
set interfaces loopback lo
set interfaces pppoe pppoe0 authentication password 'PASSWORD'
set interfaces pppoe pppoe0 authentication user 'USERNAME'
set interfaces pppoe pppoe0 default-route 'force'
set interfaces pppoe pppoe0 mtu '1500'
set interfaces pppoe pppoe0 source-interface 'eth1.35'
set nat source rule 100 outbound-interface 'pppoe0'
set nat source rule 100 translation address 'masquerade'
set service dhcp-server shared-network-name LAN subnet 172.16.10.0/24 default-router '172.16.10.1'
set service dhcp-server shared-network-name LAN subnet 172.16.10.0/24 dns-server '1.1.1.1'
set service dhcp-server shared-network-name LAN subnet 172.16.10.0/24 dns-server '8.8.8.8'
set service dhcp-server shared-network-name LAN subnet 172.16.10.0/24 lease '86400'
set service dhcp-server shared-network-name LAN subnet 172.16.10.0/24 range 0 start '172.16.10.10'
set service dhcp-server shared-network-name LAN subnet 172.16.10.0/24 range 0 stop '172.16.10.254'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 default-router '172.16.12.1'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 dns-server '1.1.1.1'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 dns-server '8.8.8.8'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 lease '86400'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 range 0 start '172.16.12.10'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 range 0 stop '172.16.12.254'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 static-mapping GloboMine ip-address '172.16.12.4'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 static-mapping GloboMine mac-address '32:08:c6:1b:fe:4e'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 static-mapping LaPetiteReplique ip-address '172.16.12.3'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 static-mapping LaPetiteReplique mac-address '36:38:9e:c2:6c:34'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 static-mapping Proxmox ip-address '172.16.12.10'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 static-mapping Proxmox mac-address 'e2:f7:fa:62:2c:6c'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 static-mapping ReverseProxy ip-address '172.16.12.5'
set service dhcp-server shared-network-name SERVER subnet 172.16.12.0/24 static-mapping ReverseProxy mac-address '66:16:fc:66:06:c7'
set service dhcp-server shared-network-name VLAN10 subnet 192.168.10.0/24 default-router '192.168.10.1'
set service dhcp-server shared-network-name VLAN10 subnet 192.168.10.0/24 dns-server '1.1.1.1'
set service dhcp-server shared-network-name VLAN10 subnet 192.168.10.0/24 dns-server '8.8.8.8'
set service dhcp-server shared-network-name VLAN10 subnet 192.168.10.0/24 lease '86400'
set service dhcp-server shared-network-name VLAN10 subnet 192.168.10.0/24 range 0 start '192.168.10.10'
set service dhcp-server shared-network-name VLAN10 subnet 192.168.10.0/24 range 0 stop '192.168.10.254'
set service dhcp-server shared-network-name VLAN11 subnet 192.168.11.0/24 default-router '192.168.11.1'
set service dhcp-server shared-network-name VLAN11 subnet 192.168.11.0/24 dns-server '1.1.1.1'
set service dhcp-server shared-network-name VLAN11 subnet 192.168.11.0/24 dns-server '8.8.8.8'
set service dhcp-server shared-network-name VLAN11 subnet 192.168.11.0/24 lease '86400'
set service dhcp-server shared-network-name VLAN11 subnet 192.168.11.0/24 range 0 start '192.168.11.10'
set service dhcp-server shared-network-name VLAN11 subnet 192.168.11.0/24 range 0 stop '192.168.11.254'
set service dhcp-server shared-network-name WLAN subnet 172.16.11.0/24 default-router '172.16.11.1'
set service dhcp-server shared-network-name WLAN subnet 172.16.11.0/24 dns-server '1.1.1.1'
set service dhcp-server shared-network-name WLAN subnet 172.16.11.0/24 dns-server '8.8.8.8'
set service dhcp-server shared-network-name WLAN subnet 172.16.11.0/24 lease '86400'
set service dhcp-server shared-network-name WLAN subnet 172.16.11.0/24 range 0 start '172.16.11.10'
set service dhcp-server shared-network-name WLAN subnet 172.16.11.0/24 range 0 stop '172.16.11.254'
set service ssh port '22'
set system config-management commit-revisions '100'
set system console device ttyS0 speed '115200'
set system host-name 'vyos'
set system login user vyos authentication encrypted-password 'PASSWORD'
set system login user vyos authentication plaintext-password ''
set system ntp server 0.pool.ntp.org
set system ntp server 1.pool.ntp.org
set system ntp server 2.pool.ntp.org
set system syslog global facility all level 'info'
set system syslog global facility protocols level 'debug'
I added your traffic shaping command above.