Paypal ipn approving order an hour late

[asiandivergal]

Dear all expert,

I have using Paypal Ipn2.2 for os m2.2 for one and half year,it works fine until today.

after payment have made,order status show pending but an hour later it approved.

Usually it is instant notification but now it happened to be an hour late.

May I know what is going wrong?we haven't make any changes since we installed.

 

Thank you for your kind help and wish a happiest day to everyone!