Issue in Teams Approval App: Simultaneous Approvals Skip Next Step

There is an issue in the Teams Approval app where simultaneous approvals cause the next step to be skipped.
Reproduction steps:

1. Navigate to the Teams Approval app.
2. Select "New approval request" to open the new input screen.
3. Turn on "Require responses in the assigned order".
4. Set two approvers (UserX, UserY) for Step 1.
5. Add Steps 2 and 3 and set approvers for each step.
6. Click "Send".
7. UserX and UserY each display the approval request details screen.
8. UserX approves.
9. UserY approves. ← No error occurs, and the process continues. ※ If UserY opens the approval request screen after UserX has approved, the approval button disappears and cannot be clicked.
10. Step 2 is automatically treated as approved, and it moves to Step 3.

When UserY approves in step 9, it should either result in an error or, if no error occurs, the approval action by UserY should be ignored in the background.