[cbale2000]

Regardless of the specific cause of this particular issue, control system brownouts are, in my opinion, a strong reason for FIRST to re-adopt the backup battery.

Back when we used backup batteries on our robots (pre 2009), the controllers on the robots, even without a backup battery, would restart and reconnect to the control system in about 5 seconds after a power loss, and even this was deemed so unacceptable that the backup battery was required.

These days you can wait upwards of a minute or more for a complete restart and reconnect of a robot between the Rio and the radio, meaning if you loose power at any point, your robot is basically dead for the rest of the match.
Why FIRST ever thought dropping the backup battery requirement was a good idea is unfathomable to me.