This article might shed more light on the issue: [link|https://www.linkedin.com/pulse/gopro-shuts-off-while-recording-macgasm-oxbie|https://www.linkedin.com/pulse/gopro-shuts-off-while-recording-macgasm-oxbie]. It outlines several potential causes for random shutdowns and includes practical tips to help troubleshoot or prevent them. Hopefully, one of the fixes mentioned there will get your GoPro back in working order.