WifiScan - Guru meditation error

Id flashed the WifiScan sketch using 115200 resulting an error:

ets Jun  8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0008,len:8
load:0x3fff0010,len:1760
load:0x40078000,len:6668
load:0x40080000,len:252
entry 0x40080034
Setup done
scan start
Guru Meditation Error of type StoreProhibited occurred on core  0. Exception was unhandled.
Register dump:
PC      : 0x400188cb  PS      : 0x00060a30  A0      : 0x801061d0  A1      : 0x3ffda600  
A2      : 0xa5a5a5a5  A3      : 0x00000000  A4      : 0x00000008  A5      : 0x3ffda970  
A6      : 0x3ffda950  A7      : 0x0000000c  A8      : 0x80102fc1  A9      : 0x3ffda5e0  
A10     : 0x3ffdacc0  A11     : 0x3ffc7830  A12     : 0x000000ff  A13     : 0x0000ff00  
A14     : 0x00ff0000  A15     : 0xff000000  SAR     : 0x00000014  EXCCAUSE: 0x0000001d  
EXCVADDR: 0xa5a5a619  LBEG    : 0x400014fd  LEND    : 0x4000150d  LCOUNT  : 0xffffffff  

Backtrace: 0x400188cb:0x3ffda600 0x401061d0:0x3ffda910 0x40081a30:0x3ffda940 0x400f263c:0x3ffda990 0x400f33a2:0x3ffdaa10 0x400f3b28:0x3ffdaae0 0x40096c34:0x3ffdab00 0x4009bb2f:0x3ffdab50 0x4009850d:0x3ffdabb0

CPU halted.

But with 921600 baud everything works fine - my question is -> why did this error happen? Can the esp32 only be flashed with 921600 baud?

[copercini]

Please decode your Backtrace with https://github.com/me-no-dev/EspExceptionDecoder and post here