Bug: User called to sumbit, but she has no active session

Error while running batmen with

batcmd: "batsim -p '/home/mael/ownCloud/workspace/expe_g5k/platform/KTH_platform.xml' -w '/home/mael/ownCloud/workspace/expe_g5k/workload/empty_workload.json' -e '/home/mael/ownCloud/workspace/expe_g5k/out/expeKTH/' --socket-endpoint=tcp://localhost:28000 --energy --enable-compute-sharing --enable-dynamic-jobs --acknowledge-dynamic-jobs --enable-profile-reuse"
schedcmd: "batmen --socket-endpoint=tcp://*:28000 -v fcfs --variant_options_filepath=/home/mael/ownCloud/workspace/expe_g5k/out/expeKTH/cmd/user_description_file.json"

[0m[2m2023-03-09 13:43:39.859 (   0.772s) [        755E4F40]            network.cpp:53    INFO| [0mReceived '{"now":2122126.000001,"events":[{"timestamp":2122126.000001,"type":"REQUESTED_CALL","data":{}},{"timestamp":2122126.000001,"type":"REQUESTED_CALL","data":{}},{"timestamp":2122126.000001,"type":"REQUESTED_CALL","data":{}},{"timestamp":2122126.000001,"type":"REQUESTED_CALL","data":{}},{"timestamp":2122126.000001,"type":"REQUESTED_CALL","data":{}},{"timestamp":2122126.000001,"type":"REQUESTED_CALL","data":{}}]}'[0m
Assertion '!active_sessions.empty()' failed (ERROR)
  in file user_feedback.cpp, line 94
  function: virtual void FeedbackUser::jobs_to_submit(double, std::__cxx11::list<Job*>&, std::__cxx11::list<Profile*>&)
  with message: User user3 has been called to sumbit but she has no active session

I suspect this is due the user receiving six REQUESTED_CALL at once.