ESP32S3 WROOM-2 Flash 32MB, 8MN PSRAM - issue with MSPI Timing: tuning fail

[dgroch]

Hi,

on my new ESP32S3 WROOM-2 32MB Flash 8MB PSRAM chips I have started seeing given error:

MSPI Timing: tuning fail, best point is fallen back to index 1

All chips are the same, however I can see given error for only on some of them. Reducing Flash frequency to:
CONFIG_ESPTOOLPY_FLASHFREQ_40M=y

is fixing issue.
I have already seen some similar topic here:
viewtopic.php?f=25&t=33328
with no answer.
What could be reason of this error only on some of the new bought chips?

BR
Dawid