the embedded broker is Moquette. Development on Moquette seems to have stalled. Jan has been maintaining a fork that is used in OpenHAB. I myself still use the embedded broker, so I know it works but most here use mosquito and the standard reply to anyone having problems with the embedded broker here in the forum has been to switch to mosquito.
no announcement but some further information about the situation if you feel like reading some more
if you post up a little more detail, such as the platform it is running on, the circumstances when it occurs and any logs generated, maybe we can figure it out