EXP39 buttons fail to change status, phone requires reboot to fix

[Yealink Support]

Hi Maerkis,
1. So only two remote phones can't change the BLF LED status? You connect one EXP39 on these two phones?
2. What about DSS key LED status on the phone DSS key, but not on EXP39? those 10 DSS keys also have this issue?
3.In this case, i am afraid we need logs on these two remote phones for analyzing.
Could you provide PCAP trace, syslog(level 6) and config.bin file to us, so we can analyze?
Before you export the syslog, please set log level as 6, and reboot the phone, then click Start,and reproduce the issue, then click Stop,and export the trace, syslog, config,bin to us.
(About where to export these files, please refer to attached screenshot.)
These three files are very important for us, hope you can kindly understand.
Thanks.