Rarely (three times in last two days of heavy use) I've had my stm32f765 board lock up during startup (after reset, not cold power on).

This occurs while trying to read a file from working filesystem on the qspi chip fairly early in main.py

With my debugger, I found the deadlock to occur at this while loop:

Resetting the board has always brought it back with it working next time, filesystem and file intact and read fine.

I haven't yet investigated the failure at all, just wanted to record it here while I have the location pinned down.