Conference Delay

[happyfsyy]

Hello, I have a question now. When creating a conference using Linphone, there is a noticeable delay.

I currently have three devices. Two are Android phones, both installed with Linphone-Android. The SIP number of the first phone is 6003, and the SIP number of the second phone is 6002. Additionally, I have a Yealink phone with a SIP account of 8007.

First, I use 6003 to call 8007. Then, I use 6003 to call 6002. Finally, I add both of them to a conference on 6003.

When I speak "one" on 6003, 8007 hears it first, followed by 6002 with a noticeable delay.

What is the issue and how can it be resolved?

The specific log link is as follows: https://www.linphone.org:444//tmp/672b06d0681e5_0e047ee8c1cf0fd1aa88.gz

[happyfsyy]

However, if I created the conference on the 8007 yealink phone, there was no delay.