@Kevin_Z Thanks Kevin for your reply ikindly be informed that i got an email from (support.forum@tp-link.com) and i replied for this email with the label as you request if you need to send same email...

Hi I just update my TL-WR940N from firmware 3.19.2 build 180611 to 3.20.1 Build 200316 but after i update i face some problems like if i want to show or hide (Enable SSID Broadcast) i have to restart...