Notifications are not working properly on frappe cloud

Hello Team,

I created workflow for expense claim. My heirachy as follows,
Employee->Expense Approver->Accounts User.

Once the employee submit for expense claim Expense approver should get notified, then he can approve or reject.
In my case email is sent when employee save his expense claim.
Also I have written condition to send email in notification.
I’m using frappe cloud instance.
Please help me to solve the issue.