Hotspot keeps asking devices to re-login

Forgive me for my bad english, as I do not speak english as my mother tongue.
Something is wrong my hotspot setup and I can not figure which one.
Please help me fix this problem.

My hotspot system keeps asking my android / iOs devices to re-login everytime a user went back to the wifi or after a few minutes of turning off the wifi connection.
What I meant with re-login is NOT where user need to re-enter username and password in the captcha box.
In my case, user just need to go to settings - wifi, and then user just need to ‘click’ on the wifi name, and thats it, wifi is connected now.
There is a message below the wifi name that says something like “Login is required”.

I have tried to change different cookie / http chap / pap settings, to no avail.
Device still asking the user everytime the user comes back within a time limit (before cookie time limit ends) to re-click on wifi name to get the device back to connected.

This did not happen when I first set the hotspot.

Anyone out there care to help me ?

Same problem here.
Using ros 7.11