It does not happen every day, but still often. And still without discernible problems while working, fingers crossed.

$ uname -a
Linux monster 5.14.0-051400rc7-generic #202108222230 SMP Sun Aug 22 22:33:09 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

$ ras-mc-ctl --errors | tail
46904 2021-09-10 07:37:33 +0200 error: corrected filtering (some unreported errors in same region) Data CACHE Level-1 Data-Read Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: green, Large number of corrected cache errors. System operating, but might leadto uncorrected errors soon, mcgcap=0x00000c08, status=0x8c20004000101135, addr=0x16ab665c0, misc=0x00142285, tsc=0x184d4b8c3, walltime=0x613af128, cpu=0x00000001, cpuid=0x000806e9, apicid=0x00000002, bank=0x00000003
46905 2021-09-10 07:37:33 +0200 error: corrected filtering (some unreported errors in same region) Data CACHE Level-1 Data-Read Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: green, Large number of corrected cache errors. System operating, but might leadto uncorrected errors soon, mcgcap=0x00000c08, status=0x8c20004000101135, addr=0x16ab665c0, misc=0x00142285, tsc=0x184d4c39b, walltime=0x613af128, cpu=0x00000003, cpuid=0x000806e9, apicid=0x00000003, bank=0x00000003
46906 2021-09-10 07:37:33 +0200 error: Data CACHE Level-1 Data-Read Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0x8c40004000100135, addr=0x13bbc2f40, misc=0x00142285, tsc=0x185ba6ba4, walltime=0x613af128, cpu=0x00000001, cpuid=0x000806e9, apicid=0x00000002, bank=0x00000003
46907 2021-09-10 07:37:33 +0200 error: Data CACHE Level-1 Data-Read Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0x8c40004000100135, addr=0x13bbc2f40, misc=0x00142285, tsc=0x185ba75b2, walltime=0x613af128, cpu=0x00000003, cpuid=0x000806e9, apicid=0x00000003, bank=0x00000003
46908 2021-09-10 07:37:33 +0200 error: Data CACHE Level-1 Data-Read Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0x8c40004000100135, addr=0x13bbc2f40, misc=0x00122285, tsc=0x185baa957, walltime=0x613af128, cpu=0x00000001, cpuid=0x000806e9, apicid=0x00000002, bank=0x00000003
46909 2021-09-10 07:37:33 +0200 error: Data CACHE Level-1 Data-Read Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0x8c40004000100135, addr=0x15e38fc58, misc=0x00102285, tsc=0x1862c9349, walltime=0x613af128, cpu=0x00000001, cpuid=0x000806e9, apicid=0x00000002, bank=0x00000003
46910 2021-09-10 07:37:33 +0200 error: Data CACHE Level-1 Data-Read Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0x8c40004000100135, addr=0x15e38fc58, misc=0x00102285, tsc=0x1862c99aa, walltime=0x613af128, cpu=0x00000003, cpuid=0x000806e9, apicid=0x00000003, bank=0x00000003
46911 2021-09-10 07:37:33 +0200 error: Generic CACHE Level-1 Eviction Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0x8c40004000100179, addr=0x1507ea6c0, misc=0x00744285, tsc=0x185ae7699, walltime=0x613af128, cpu=0x00000003, cpuid=0x000806e9, apicid=0x00000003, bank=0x00000003
46912 2021-09-10 07:37:33 +0200 error: Generic CACHE Level-1 Eviction Error, mcg mcgstatus=0, mci Corrected_error Threshold based error status: yellow, mcgcap=0x00000c08, status=0x8c40004000100179, addr=0x1507ea6c0, misc=0x00744285, tsc=0x185ae6aac, walltime=0x613af128, cpu=0x00000001, cpuid=0x000806e9, apicid=0x00000002, bank=0x00000003