Is there a bug for asterisk12 about srtp?

I found a bug for asterisk about srtp: when ssrc changed,eg. from early bridge to bridge,if ssrc is still old value,it will be should add a condition befor remove the srtp context,because libsrtp using ssrc index. microsoft media server requires ssrc no changing for the session .
I think it is a bug.
another way, asterisk losing a feature for optional srtp.Will it be surpporte for the future?I am expected that.
BR … +Backtrace