Receive BINDING SUCCESS but iceconnectionstate shows "disconnected"

[yf z]

Here I have a SFU server, which implements lite ICE.

I add 'a=ice-lite' in the answer sent by SFU server

a=ice-lite
a=end-of-candidates
m=audio 60006 UDP/TLS/RTP/SAVPF 111 63 103 104 9 0 8 106 105 13 110 112 113 126
c=IN IP4 10.1.29.248
a=rtcp:60007 IN IP4 10.1.29.248
a=candidate:2999745851 1 udp 2122260223 10.1.29.248 60006 typ host
a=ice-ufrag:agvl
a=ice-pwd:6ylZewlh88nH0UeQffoo9HOw
a=ice-options:trickle

WireShark shows that every binding request received a binding success response. But iceconnectionstate always shows "disconnected". How can I solve it?