Nethunter rootless Kex Client kali login screen prompt after 5mins idle

Scenario:

Using nethunter on termux
-nh
Running kex
-kex
Password prompt: *****

Opening nethunter kex client
Now Running

Problem:
Left the device on idle while on the kex client. The screen turns black after a while because of screensaver settings, and when the mouse pointer is moved, the screen presents kali login prompt(image above uploaded). Entering “kali” as default password but the response is “authentication failed”. No password was changed to begin with.