Site’s health Critical Issue PHP active session

Hello, thanks for the plugin!, I′m getting the following on Site’s health page (already checked disabling all plugins and enabling them one by one and it dissapear when Discounts Manager for products is disabled. Also I have to disable it to perform several tasks as importing csv files and other.

Critical Issue:
An active PHP session was detected Performance

A PHP session was created by a session_start() function call. This interferes with REST API and loopback requests. The session should be closed by session_write_close() before making any HTTP requests.

Thanks for your help