When plotting vectorial sensitivity analysis results, the time axis is off.
You can even spot it in this example, Figure 110, where time duration indicates 300s while the actual simulation time is 40s: https://openmodelica.org/doc/OpenModelicaUsersGuide/latest/parametersensitivity.html
I have managed to reproduce the error in my model, where I have used simulation time of 20s, but in vectorial sensitivity plot it is scaled to 300s.
Is it safe to assume that 300s on plot relates simulation end time, what ever it is?