No Review Reminder Pending Link/Info in Admin Order Edit Page

Today i tested creating some Orders.
After setting Orders Status to completed i see under Review Reminder (see Image right), a Link/Info Pending.
If i’ve seen that i send Reminder Emails.
Now i tested the Review Link in the sent Emails.
In all Emails i could make unlimited Reviews with one Link.

After fixed this Problem i made new Order.
Now i not see Pending Review Reminder Link, can’t send Reminder Emails.

How to fix this Problem.