If Station was connected to an AP that offered 2 DNS via dhcps and then connects to another AP that only offers 1 DNS, WiFi.dnsIP(1) keeps reporting the second DNS from the previous connection.

[arichli]

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3. If you haven't already done so, test your issue against current master branch (aka latest git), because it may have been already fixed.
4. Describe your problem.
5. If you have a STACK DUMP decode it:

https://arduino-esp8266.readthedocs.io/en/latest/Troubleshooting/stack_dump.html

6. Include a Minimal Complete Reproducible Example sketch that shows your issue. Do not include your entire project, or a huge piece of code.
7. Include debug messages:

https://arduino-esp8266.readthedocs.io/en/latest/Troubleshooting/debugging.html

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Basic Infos

• This issue complies with the issue POLICY doc.
• I have read the documentation at readthedocs and the issue is not addressed there.
• I have tested that the issue is present in current master branch (aka latest git).
• I have searched the issue tracker for a similar issue.
• If there is a stack dump, I have decoded it.
• I have filled out all fields below.

Platform

• Hardware: [ESP-12|ESP-01|ESP-07|ESP8285 device|other]
• Core Version: [latest git hash or date]
• Development Env: [Arduino IDE|Platformio|Make|other]
• Operating System: [Windows|Ubuntu|MacOS]

Settings in IDE

• Module: [Generic ESP8266 Module|Wemos D1 mini r2|Nodemcu|other]
• Flash Mode: [qio|dio|other]
• Flash Size: [4MB/1MB]
• lwip Variant: [v1.4|v2 Lower Memory|Higher Bandwidth]
• Reset Method: [ck|nodemcu]
• Flash Frequency: [40Mhz]
• CPU Frequency: [80Mhz|160MHz]
• Upload Using: [OTA|SERIAL]
• Upload Speed: [115200|other] (serial upload only)

Problem Description

Detailed problem description goes here.

MCVE Sketch

#include <Arduino.h>

void setup() {

}

void loop() {

}

Debug Messages

Debug messages go here