I createf one custom page having standard cotroller Account .
I added this page on Account layout 
 when i open Account datial i am getting home page in that section

 

If i refresh the custom page one time after that i am not getting this issue
Note: I am facing this problem in sandbox only whose url is like this https://123cmpl--123val.cs15.my.salesforce.com/066e00000009iUI
 

how to rollBack apex job by using Database.Savepoint