Mentors not wanting to stay

[JamesCH95]

3 mentors is not enough to effectively run a team. You'll want to pull more mentors into the fold and find a way to get mentors personally invested in your team.

I don't know how your team operates, but I've noticed increasing intrusions from smartphones and other devices. As a mentor this infuriates me. Your mentors may feel that "if the students waste all of their time during build season, I don't want to stay late to help them make up for it." Would you continue to invest in a company if they squandered your initial investment?

This may not be the issue at all... just a possible one.

There may also be more going on behind the scenes that you don't/won't know about. Mentors have been threatened with divorce, gotten extremely ill, fallen behind at work, etc due to their time commitments on FRC teams.

Remember that it is MUCH easier to be a student on an FRC team than a mentor. However hard the season has been on you as a student, imagine at least double that challenge for your mentors. I say this having been a student for four years and a full-time mentor for six.