Description
Information on Hw/Sw pattern
Arduino core MKR WiFi 1010
WIFININA ver. 1.4.7
MDNS_Generic ver 1.1.0
Arduino ver 1.8.15
Describe the bug
The hw runs a web server with mDns initialised with hostname 'mkr_1010'.
The system does well with mDNS after reset. Using Chrome/Safari browsers on different client devices (Mac, iPhone, iPad)it quickly answers the mDNS service at http://mkr_1010.local.
ISSUE: if left for few minutes (~more than 1-2) with no web requests the system no longer answers the http://mkr_1010.local url. The fw is running as the browser correctly opens the http://[IP address] request but no any longer the http://mkr_1010.local url.
Steps to Reproduce
It is a steady behaviour and it is always enough to wait few minutes after the system reset to reproduce.
Debug
Tried to remove and re-add the mDNS service after a couple of minutes of no client requests (removeAllServiceRecords();addServiceRecord(...);): no change in behaviour.
For your convenience I also add the following Wireshark screenshot:
This screenshot shows the sniffering of the filtered ip.addr==192.168.1.138 (the system under test) coming from an hour of no web requests after the last successful http://mkr_1010.local request sent from the Chrome client.
Before time 08:19:41.091806 (blue selected row) I sent a couple of Chrome requests with no answer after the no-requests hour delay.
At time 08:19:41.091806 I pressed the reset button on the MKR WiFi 1010 pcb and sent a new http://mkr_1010.local request from the browser.
And everything restarts working: see please from time 08:22:14 and later.
Additional context
Googling around I've found this same issue exists for other platform(s). See please espressif/arduino-esp32#4406
I'm desperate.
Any help very appreciated.
Thank you.
Stefat