JetPack 4.5 reboots -- possibly imx477 related

Is there a known issue with JetPack 4.5 and random reboots, perhaps related to memory use? Tends to happen on a Nano and NX when i’m compiling sometimes, so I’m thinking power or memory or ???.

The kernel I am using is custom (imx477 drivers are added), but the config should be identical to the 4.5 tegra-defconfig. Has that been modified since? Any known issues with imx477 random reboots?

Disconnect the imx477 still the same? Check the kernel message by UART would be good.