Seesion ID Restarts or Conflicts between users in asp.net

Question

Hello Friends,

 

I have a question regarding Session Conflicts in a web browser.

Technology:  Mysql, DevExpress MVC, Chrome 

 

Problem Description: 

 

User 1 on Machine 1 Logged in and started his work on grid view 

then

After some time 

User 2 on Machine 2 gets Logged in, on the same time the Icons of User 1 gets disappeared from GridView.

here, We have used link-buttons for Add, Update, Edit and have attached icons to that links.

 

and User 1 do any operation expect page refresh [F5] then also icons not came back.

 

Where is the problem? Means on Server while maintaining the session or where?

 

thank you