Not related to the shutdown feature. The vehicle enters low power mode when it detects an error with any of the motor sensors. It’s a safety feature that prevents the motor from completely turning off when such errors occur.
Over The Air Updates - #17 has fixed the errors for most people. Not sure in your case, and the service team would be in the best position to identify and fix the issue.
Do raise a request through the app or by reaching out to customer care.