eMMC disappears at lower temperatures

Hello,
I have a problem with UP Squared. The eMMC containing the operating system seems to have disappeared. I need to reboot the device several times (1-40) and then the eMMC will appear and the system boots. However, when the power is turned off and on, the problem returns. It does not help to reset the BIOS by disconnecting the battery and power. This problem occurs only at a lower ambient temperature (3-10 ° C). Even when I use liveUSB, the eMMC can not be seen.
UP Squared Pentium Quad Core 8GB / 128GB eMMC
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Hi Radek,
The temperatures are on the low side of the operating range but that should be OK.
Hi Javier,