BERT: Error records from previous boot: Firmware Error Record Type: SOC Firmware Error Record Type2, Revision: 2, Record Identifier: 8f87f311-c998-4d9e-a0c4-6065518c4f6d while training neural network on CPU

I was training a neural network on CPU using Tensorflow + Keras in Python. The crash happened twice in the same day after installing an update to Ubuntu.

1) Ubuntu 20.04.4 LTS
2)
intel-microcode:
  Installed: 3.20210608.0ubuntu0.20.04.1
  Candidate: 3.20210608.0ubuntu0.20.04.1
  Version table:
 *** 3.20210608.0ubuntu0.20.04.1 500
        500 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
        100 /var/lib/dpkg/status
     3.20191115.1ubuntu3 500
        500 http://us.archive.ubuntu.com/ubuntu focal/main amd64 Packages

3) Not crash.

4) Crash.

Excerpt from /var/log/kern.log:

BERT: Error records from previous boot:
[Hardware Error]: event severity: fatal
[Hardware Error]: Error 0, type: fatal
[Hardware Error]: section_type: Firmware Error Record Reference
[Hardware Error]: Firmware Error Record Type: SOC Firmware Error Record Type2
[Hardware Error]: Revision: 2
[Hardware Error]: Record Identifier: 8f87f311-c998-4d9e-a0c4-6065518c4f6d
[Hardware Error]: 00000000: 0100c303 00000280 04726ce2 0000002f .........lr./...
[Hardware Error]: 00000010: 000a0000 00000010 80001fff 0001f668 ............h...
[Hardware Error]: 00000020: 0001f664 000231c6 deadbeef deafbeef d....1..........

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: intel-microcode 3.20210608.0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.13.0-30.33~20.04.1-generic 5.13.19
Uname: Linux 5.13.0-30-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Feb 23 09:32:56 2022
InstallationDate: Installed on 2021-11-23 (91 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
SourcePackage: intel-microcode
UpgradeStatus: No upgrade log present (probably fresh install)