Yeastar with Yealink+BLF = crash

Hi all,

First of all Happy Chinese new year !

I am using the YeaStar IPPBX Soho in combination several Yealink phones.
In the Yealink phones I have programmed BLF-keys.

If someone is talking with an external call and an other phone is picking up a new call with the BLF key, the SOHO crashes.
Yeastar blames the new firmware in the Yealink phones, that the BLF functionality in the Yealink crashes Asterisk software in the YeaStar...

Am I the only one with the problem ?

Kind regards,
Patrick