Actually, with the setting ‘Always on Top’, the popup will open for new chat window only but won’t for upcoming messages of ongoing chat window. Because, if we allow popup for each and every message of ongoing One-to-One Chat as well as Group Chat, it might disturb you. Hence, to make you work conveniently with other works during the Chat, we designed ‘Always on Top’ setting to popup for new chat window only.
And we will increase the time limit from 2 seconds to 5 seconds for the alert to be displayed at the right bottom of the screen. Because, if we change its functionality to stay till it get closed, you will get more alerts while chatting with multiple users which will occupy whole the right side screen and won’t convenient to you.
Hope this helps you.