Comment 7 for bug 1872504

The error occurs even without writing to the hard disk. I didn't find the exact procedure to reproduce the error, it seems to happen during mounting or unmounting, maybe only from nautilus, but even in this case I don't have the changes of the date any time. The Date doesn't change by 30 days but 1 month and there are only some files affected, but repeatedly. Even that not consistently.
On my hard drive there is only one directory and the subdirectories affected:
unmount + save remove from nautilus/mount automatically via entry in fstab, listings from terminal, from a single session on Nov 18 2020(!), here only the files "Fuga.blend1, Materials.blend1, Mixereinstellungen.vmsms" affeced - I have no idea, what the common feature may be.

sebastian@osamu:/media/4tbp/Eigene Videoprojekte/Fuga BWV 863$ ls -l
insgesamt 106752
-rwxr-xr-x 1 root root 1016 Dez 9 2020 Ablauf.txt
-rwxr-xr-x 1 root root 2990398 Dez 5 2020 'BWV 863 (I, 18 gis-moll) Selbst.mp3'
-rwxr-xr-x 1 root root 1325052 Dez 12 2020 Fuga.blend
-rwxr-xr-x 1 root root 1325148 Jul 9 2021 Fuga.blend1
-rwxr-xr-x 1 root root 73990 Dez 9 2020 'Fuga BWV 863.aup'
drwxr-xr-x 4 root root 131072 Dez 5 2020 'Fuga BWV 863_data'
-rwxr-xr-x 1 root root 231661 Dez 18 2020 Fuga_take2.aup
drwxr-xr-x 4 root root 131072 Dez 18 2020 Fuga_take2_data
-rwxr-xr-x 1 root root 4376783 Dez 9 2020 'Leuchtender Boden Cycles.png'
-rwxr-xr-x 1 root root 1185996 Dez 9 2020 Materials.blend
-rwxr-xr-x 1 root root 1185996 Jul 9 2021 Materials.blend1
-rwxr-xr-x 1 root root 2966841 Dez 9 2020 MIDI.mp3
-rwxr-xr-x 1 root root 151 Jul 9 2021 Mixereinstellungen.vmsms
-rwxr-xr-x 1 root root 249378 Dez 5 2020 Synchro.kdenlive
drwxr-xr-x 2 root root 131072 Dez 18 2020 take2_video
-rwxr-xr-x 1 root root 84884 Dez 6 2020 Test1.kdenlive
-rwxr-xr-x 1 root root 91579391 Jan 6 2021 Test1.webm
drwxr-xr-x 2 root root 131072 Dez 5 2020 'Video Test Alphaclips'
drwxr-xr-x 2 root root 131072 Dez 5 2020 'Video Test-Rohdaten'

no file used, just removed and mounted again:

-rwxr-xr-x 1 root root 1016 Dez 9 2020 Ablauf.txt
-rwxr-xr-x 1 root root 2990398 Dez 5 2020 'BWV 863 (I, 18 gis-moll) Selbst.mp3'
-rwxr-xr-x 1 root root 1325052 Dez 12 2020 Fuga.blend
-rwxr-xr-x 1 root root 1325148 Aug 9 2021 Fuga.blend1
-rwxr-xr-x 1 root root 73990 Dez 9 2020 'Fuga BWV 863.aup'
drwxr-xr-x 4 root root 131072 Dez 5 2020 'Fuga BWV 863_data'
-rwxr-xr-x 1 root root 231661 Jan 18 2021 Fuga_take2.aup
drwxr-xr-x 4 root root 131072 Dez 18 2020 Fuga_take2_data
-rwxr-xr-x 1 root root 4376783 Dez 9 2020 'Leuchtender Boden Cycles.png'
-rwxr-xr-x 1 root root 1185996 Dez 9 2020 Materials.blend
-rwxr-xr-x 1 root root 1185996 Aug 9 2021 Materials.blend1
-rwxr-xr-x 1 root root 2966841 Dez 9 2020 MIDI.mp3
-rwxr-xr-x 1 root root 151 Aug 9 2021 Mixereinstellungen.vmsms
-rwxr-xr-x 1 root root 249378 Dez 5 2020 Synchro.kdenlive
drwxr-xr-x 2 root root 131072 Dez 18 2020 take2_video
-rwxr-xr-x 1 root root 84884 Dez 6 2020 Test1.kdenlive
-rwxr-xr-x 1 root root 91579391 Jan 6 2021 Test1.webm
drwxr-xr-x 2 root root 131072 Dez 5 2020 'Video Test Alphaclips'
drwxr-xr-x 2 root root 131072 Dez 5 2020 'Video Test-Rohdaten'

...
-rwxr-xr-x 1 root root 1325148 Sep 9 2021 Fuga.blend1
-rwxr-xr-x 1 root root 1325148 Okt 9 2021 Fuga.blend1

And:
sebastian@osamu:/media/4tbp/Eigene Videoprojekte/Fuga BWV 863$ find -newer Fuga_take2.aup -printf '%Ac %Cc %Tc %p\n'
Mo 31 Dez 1979 01:00:00 CET Sa 09 Okt 2021 18:16:36 CEST Sa 09 Okt 2021 18:16:38 CEST ./Mixereinstellungen.vmsms
Mo 31 Dez 1979 01:00:00 CET Sa 09 Okt 2021 17:12:02 CEST Sa 09 Okt 2021 20:28:58 CEST ./Materials.blend1
Mo 31 Dez 1979 01:00:00 CET Sa 06 Nov 2021 00:30:36 CET Sa 09 Okt 2021 20:30:06 CEST ./Fuga.blend1

-> last status change and last modification timestamp may change independently as in "Fuga.blend1", but not in the other two files.

Hope that information helps to find the bug.