I would like to do online training with a contextual Vowpal Wabbit model, so I need to save and reload frequently. However, whenever I try to reload a model (which was initialized with –save_resume), I get an exception with: Example Code to reproduce: Python 3.8.5 vowpalwabbit==8.10.1 If I don’t use –save_resume, load and save work, however the model performance is