I wish more people would report the BECM issue on the NTHSA complaint board - especially if it's causing a clear safety issue like suddenly stopping the car. I recently did a search on the board and found 9 hits for "BECM" or "battery energy" for 2017 Volts, and 0 for any other year (2016-19). But from this forum and Reddit it seems the problem is much more widespread. The government is not going to force a recall unless they have evidence that it's a serious and common safety issue.
To make it easy, here is the link to do so. Approximately 100,000 Volts were manufactured between 2016-2019.
Report a Vehicle Safety Problem, Equipment Issue | NHTSA