Many thanks for letting us know about this, and your support for TrainingPeaks Virtual.

This may be an issue with the hardware capabilities of your Chromebook, without knowing more about it's CPU / RAM etc, it's hard to diagnose further. Please feel free to reach out directly to Customer Support (virtual@trainingpeaks.com) who may be able to help you explore the various in-app settings to improve the performance for you.

All that said, I'm pleased to say that the latest release of TrainingPeaks Virtual contains a significant number of fixes that should hopefully improve performance as well, so the combination of optimising your settings and the new release should hopefully make things better for you!