2.3.0:SD card and WiFi.disconnect(); generate random reset

[luc-github]

Hi I am using ESP12E with 4M flash / 1MSPIFF CPU 160Mhz and SDCard reader using stable 2.3.0

I have random boot issue since I try to integrate SD card library to my project when sample SDWebserver on same configuration does not have any - originally I was thinking about a conflict with SPIFFS so I modified sample to add SPIFFS but no luck, I moved position of SD.begin and SPIFFS.begin reset changed but still there.

Then I realize my project has a WiFi.disconnect(); at start to avoid unwished trying connection before setup start in AP or STA. so I have added to sample and an automatic restart command in loop :
https://gist.github.com/luc-github/685c27ea65707a8091fb84867899a2c2#file-sdwebserver-ino

here the error - sometimes after some reset it pass somethimes it is stuck to wdt reset

Connecting to NETGEAR_2GEXT_OFFICE2
Connected! IP address: 192.168.1.103
MDNS responder started
You can now connect to http://esp8266sd.local
HTTP server started
SD Card initialized.
Restart

 ets Jan  8 2013,rst cause:2, boot mode:(3,7)

load 0x4010f000, len 1384, room 16 
tail 8
chksum 0x2d
csum 0x2d
v09f0c112
~ld

 ets Jan  8 2013,rst cause:2, boot mode:(3,7)

load 0x4010f000, len 1384, room 16 
tail 8
chksum 0x2d
csum 0x2d
v09f0c112
~ld

 ets Jan  8 2013,rst cause:4, boot mode:(3,7)

wdt reset
load 0x4010f000, len 1384, room 16 
tail 8
chksum 0xaf
csum 0xaf
csum err
ets_main.c

I also use WiFi.mode(WIFI_OFF); but only WiFi.disconnect(); bring the problem
if I comment WiFi.disconnect(); I can do several restart without issues

Connecting to NETGEAR_2GEXT_OFFICE2
Connected! IP address: 192.168.1.103
MDNS responder started
You can now connect to http://esp8266sd.local
HTTP server started
SD Card initialized.
Restart
ø
Connecting to NETGEAR_2GEXT_OFFICE2
Connected! IP address: 192.168.1.103
MDNS responder started
You can now connect to http://esp8266sd.local
HTTP server started
SD Card initialized.
Restart
ø
Connecting to NETGEAR_2GEXT_OFFICE2
Connected! IP address: 192.168.1.103
MDNS responder started
You can now connect to http://esp8266sd.local
HTTP server started
SD Card initialized.
Restart

Is that a known issue ? Or I use WiFi.disconnect(); too early ?

Thanks

[luc-github]

Just an update to confirm without WiFi.disconnect(); at start - I did not got any wdt/reset issue at boot during 2 days of several restart

[luc-github]

Changing board to NodeMCU and problem disappear - using 2.3.0 and git
Could be a defective board - so I close issue