⟨10kwat⟩ Before opening a github issue, this worth reporting /  related to principia? i believe i can repro it with a journal.
Log file created at: 2024/04/08 20:12:23
Running on machine: STATION21
Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg
    @   00007FF8386F44FF      google::LogMessageFatal::~LogMessageFatal [0x00007FF8386F44FE+46]
    @   00007FFF8E8CF698      principia__VesselVelocity [0x00007FFF8E8CF697+659239]
    @   00007FFF8E9770A8      principia__VesselVelocity [0x00007FFF8E9770A7+1345847]
    @   00007FFF8E7FD1D2      principia__UpdatePrediction [0x00007FFF8E7FD1D1+7137]
    @   00007FFF8E7FBCDD      principia__UpdatePrediction [0x00007FFF8E7FBCDC+1772]
    @   00007FF84E4A9363      recalloc [0x00007FF84E4A9362+162]
    @   00007FF84F58257D      BaseThreadInitThunk [0x00007FF84F58257C+28]
    @   00007FF850B8AA58      RtlUserThreadStart [0x00007FF850B8AA57+39]
F0408 20:12:23.807080 11576 apsides_body.hpp:242] Check failed: apoapsis_time == trajectory.t_min() (1957-01-09T21:54:35,9683296680450439 (TT) vs. 1957-01-09T21:40:15,6076850891113281 (TT)) (on fatal log)