LACP LAG showing UP when it's not receiving LACP packets

Two switches are interconnected

GE1/1/0/4 port is added to aggregation port 4. At this time, the peer device is not configured for aggregation. GE1/1/0/4 port is in the default state, but the aggregation port displays UP.

[hwzc-spine]dis link-aggregation ver Bridge-Aggregation 10
Loadsharing Type: Shar -- Loadsharing, NonS -- Non-Loadsharing
Port Status: S -- Selected, U -- Unselected, I -- Individual
Port: A -- Auto port, M -- Management port, R -- Reference port
Flags:  A -- LACP_Activity, B -- LACP_Timeout, C -- Aggregation,
        D -- Synchronization, E -- Collecting, F -- Distributing,
        G -- Defaulted, H -- Expired
 
Aggregate Interface: Bridge-Aggregation10
Creation Mode: Manual
Aggregation Mode: Dynamic
Loadsharing Type: Shar
Management VLANs: None
System ID: 0x8000, 0c3a-faa7-5c00
Local:
  Port                Status   Priority Index    Oper-Key               Flag
  GE1/1/0/4(R)        S        32768    1        1                      {CDEFG}
Remote:
  Actor               Priority Index    Oper-Key SystemID               Flag
  GE1/1/0/4           32768    0        0        0x8000, 0000-0000-0000 {DEF}
[hwzc-spine]dis int Bridge-Aggregation10 brie
Brief information on interfaces in bridge mode:
Link: ADM - administratively down; Stby - standby
Speed: (a) - auto
Duplex: (a)/A - auto; H - half; F - full
Type: A - access; T - trunk; H - hybrid
Interface            Link Speed     Duplex Type PVID Description
BAGG10               UP   1G(a)     F(a)   A    1

The aggregation member port is selected by default, which means that when the member port of the dynamic aggregation group is in the up state, and the member port does not receive LACPDU after the LACP timeout period, one of all the member ports in the up state will be selected as the selected port.

By configuring lacp default selected port disable and disabling the aggregation member port default selection function, member ports in the dynamic aggregation group that are in the up state will be in a non selected state when they do not receive LACPDU.

[hwzc-spine]lacp default-selected-port di
[hwzc-spine]lacp default-selected-port disable
[hwzc-spine]dis int Bridge-Aggregation10 brie
Brief information on interfaces in bridge mode:
Link: ADM - administratively down; Stby - standby
Speed: (a) - auto
Duplex: (a)/A - auto; H - half; F - full
Type: A - access; T - trunk; H - hybrid
Interface            Link Speed     Duplex Type PVID Description
BAGG10               DOWN auto      A      A    1