Low temperature restart problem?

Now I am using a jetson xavier 4.3 kernel.The module manual says this board can support temperature range for -25℃ to 80℃ .But I found my board will restart about 0 ℃.Besides,the network become disfluency at this time.
The test way I used is as below:
Imrove temperature for -19℃ to 0 ℃ continuously about 3℃ per minute, then board restart.
The video shows the details about board restart before and after.

please give me some advice, thanks any way!

There is no update from you for a period, assuming this is not an issue any more.
Hence we are closing this topic. If need further support, please open a new one.

Please describe your test in detail. Are you testing with devkit or custom board? What’s the test setup, is it in temperature chamber or others, better to share a photo of test setup? What’s the temperature zones info showed with command line tegrastat? Is there any log file can be checked when this happen?