gazebo crash when restart simulation environment of ARIAC2019

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We are doing some automatic tests for some ariac2019 compitition project, when we changing config file of the gear2019,we need close and restart ariac2019 gazebo environment many times,But we often meet a gazebo crash like this:

gzserver: /usr/include/boost/smart_ptr/enable_shared_from_this.hpp:51: boost::shared_ptr<x> boost::enable_shared_from_this<t>::shared_from_this() [with T = gazebo::transport::Node]: Assertion `p.get() == this' failed.

This error result gazebo spawn model service can not start, we do not know what’s cause this error,please help.thinks! this is ariac2019 gazebo environment :https://bitbucket.org/osrf/ariac/wiki/2019/Home