ESP32 as WiFi access point crashes on connection

I'm programming an ESP32 via ArduinoIDE and stumble upon a strange problem. It operates as WiFi access point, the code is quite simple and straight-forward:

IPAddress apIP(192,168,1,1);

WiFi.mode(WIFI_AP);
WiFi.softAP("MyESP32");
WiFi.softAPConfig(apIP,apIP,IPAddress(255,255,255,0));

Now when a client connects to this AP, it often prints out these error messages:

dhcps: send_nak>>udp_sendto result 0
dhcps: send_offer>>udp_sendto result 0

...and sometimes they are followed by a crash:

Guru Meditation Error: Core  0 panic'ed (InstrFetchProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x00000000  PS      : 0x00060e30  A0      : 0x8011cc29  A1      : 0x3ffb3e00  
A2      : 0x3ffcdbd0  A3      : 0x3ffcde04  A4      : 0x3ffcd844  A5      : 0x3ffcd824  
A6      : 0x0201a8c0  A7      : 0x0c01a8c0  A8      : 0x8011cacc  A9      : 0x3ffb3dc0  
A10     : 0x3ffcdbe0  A11     : 0x3ffcde04  A12     : 0x3ffb3e0c  A13     : 0x00000044  
A14     : 0x00000001  A15     : 0x00000006  SAR     : 0x00000010  EXCCAUSE: 0x00000014  
EXCVADDR: 0x00000000  LBEG    : 0x4000c349  LEND    : 0x4000c36b  LCOUNT  : 0x00000000  

Backtrace: 0x00000000:0x3ffb3e00 0x4011cc26:0x3ffb3e40 0x40129959:0x3ffb3e60 0x4012e961:0x3ffb3ea0 0x40133bfe:0x3ffb3ec0 0x4011d54b:0x3ffb3ee0 0x40089001:0x3ffb3f10

To say that clear: this happens during connection of a client, nothing else is done where my own ESP32 code would be involved.

Any idea what the reason could be for this and how to fix it?

The core panic in the time of client connect can be solved by adding a 2 seconds delay after 'WiFi.softAP' and before 'WiFi.softAPConfig' like this:

IPAddress apIP(192,168,1,1);

WiFi.mode(WIFI_AP);
WiFi.softAP("MyESP32");
delay(2000);
WiFi.softAPConfig(apIP,apIP,IPAddress(255,255,255,0));

more info can be found here: WiFi.softAPIP() causes Core 0 panic'ed (InstrFetchProhibited)