Brand new camera, fully charged battery, SanDisk Extreme microSDXC 256GB (empty, no files) Class 10 90/Mbs write speed, resolution 4K 16:9 / 60.

I just barely caught the on-screen message that said the camera would be shutting down in 2 seconds.  It did NOT overheat.

I'm wondering what issues - other than heat - will cause it to shut itself down.  For example if the SD card write speed wasn't fast enough.

Hi there, thank you for reaching out. The SD card that you are using currently is not compatible with DJI Osmo Action 5 Pro. Below are the recommended SD cards.

SanDisk Extreme PRO 32GB U3 A1 V30 microSDHC
Kingston CANVAS Go! Plus 64GB U3 A2 V30 microSDXC
Kingston CANVAS Go! Plus 128GB U3 A2 V30 microSDXC
Kingston CANVAS Go! Plus 256GB U3 A2 V30 microSDXC
Kingston CANVAS Go! Plus 512GB U3 A2 V30 microSDXC
Lexar Professional 1066x 64GB U3 A2 V30 microSDXC
Lexar Professional 1066x 128GB U3 A2 V30 microSDXC
Lexar Professional 1066x 256GB U3 A2 V30 microSDXC
Lexar Professional 1066x 512GB U3 A2 V30 microSDXC
Kingston CANVAS Go! Plus 1TB U3 A2 V30 microSDXC

Thank you.