What happened?

Since release v3.9.0, ESP8266 is broken when serving flash content and possibly other kind of data like json, chunk responses or large responses.

The request is made but the server does not answer.

User reports:

• Compile & Link fails for ESP8266 ayushsharma82/ElegantOTA#280 (comment)
• Feedback for “Integration” ayushsharma82/ElegantOTA#281