Qualcommax NSS Build

Hi, I got my hands on the WXR-5950AX12 so I tried the latest NSS build firm, and it's performing exceptionally well. However, I’ve fond some strange behavior.
I’ve set up VLANs on the 10G port of LAN1 and created several virtual access points, but there's a difference in download speed when the switch ports are linked at 1G and 10G.

At 10G link speed, both download and upload speeds during LAN communication reach around 1.7-1.9 Gbps.
However, when linked at 1G, the download speed inexplicably drops to around 500-600 Mbps, while the upload speed remains at 1 Gbps.

In theory, if I'm getting over 1 Gbps during 10G link, both DL/UL should reach at least 900Mbps. This behavior seems a bit odd to me.

The switch I'm using is an Allied Telesis X510L switch, and I tested it with both a 1 Gbps port and an SFP+ port. The 10G-T SFP+ connected to the SFP+ port is MikroTik's S+RJ-10. The cables used and the testing locations are the same.

Is there any possible cause that could be considered, such as needing to tune the bridge?

The configuration of the AX12 (newly installed from the uImage, with minimal changes)

/etc/config/network

config globals 'globals'
        option ula_prefix 'fd49:d29b:6446::/48'

config device
        option type '8021q'
        option ifname 'lan1'
        option vid '1'
        option name 'lan1.1'
        option ipv6 '0'

config device
        option type 'bridge'
        option name 'br-vlan1'
        list ports 'lan1.1'
        option ipv6 '0'

config interface 'vlan0001'
        option proto 'static'
        option device 'br-vlan1'
        option ipaddr '172.20.1.10'
        option netmask '255.255.255.0'
        option gateway '172.20.1.1'
        list dns '1.1.1.1'

and some other vlan settings

/etc/config/wireless

config wifi-device 'radio0'
        option type 'mac80211'
        option path 'platform/soc/c000000.wifi'
        option channel '100'
        option band '5g'
        option htmode 'HE160'
        option cell_density '0'
        option txpower '23'
        option country 'US'

config wifi-iface 'wifinet2'
        option device 'radio0'
        option mode 'ap'
        option ssid 'VLAN1'
        option encryption 'sae'
        option ifname 'r0.1'
        option key '123123123123'
        option network 'vlan0001'

and some other virtual AP settings

the config of switch

interface port1.0.1 /* 1G copper port */
 switchport
 switchport mode trunk
 switchport trunk allowed vlan add 1-30
 switchport trunk native vlan none


interface port1.0.27  /* 10G SFP+ port */
 switchport
 switchport mode trunk
 switchport trunk allowed vlan add 1-30
 switchport trunk native vlan none