T26 Park Button problem Asterisk v1.8

[Yealink Support]

Hi JaredBusch,

We can reproduce your issue in our phones and we has corrected it in test firmware. But we can't reproduce the issue strabuzano have, we can't know why server send the notify to other phones.
The first thought may be that the server sends the notify message to wrong phones.
However, strabuzano said other brands can work well in the same environment. So we need to compare the trace pcap of them with Yealink phones.