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Ground Controller Lvl 1
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ESP32 Wroom32 reliability problem?

ESP32 Wroom32 reliability problem?
I have 10pcs in two applications on two HW.
Out of 10 new 1pcs at ESPTools 3.5.7 arduino IDE reports "Warning: Could not auto-detect Flash size (FlashID = 0x0, SizeID = 0x0), defaulting to 4MB" which is defective Flash. On the second piece, the FW webupdate reports "Guru Meditation Error: Core 1 Panic'ed (IllegalInstruction). Exception was unhandled.
Memory dump at 0x4014e850: Bad00Bad Bad00Bad Bad00Bad
Guru Meditation Error: Core 1 Panic'ed (Unhandled debug exception)
Debug exception reason: Stack canary watchpoint triggered
Guru Meditation Error: Core 2 Panic'ed (Guru Meditation Error: Core 2 Panic'ed (Double exception) "

which is a problem again with FLASH, but FW can be loaded via Arduino IDE other pieces work fine. How to solve it? The failure rate is 20% which is enough. What is your experience?