Payment failed - expiry too long

I keep getting the follow error:

Payment failed no money has been sent error: cannot add htlc with origin=local(...),some(actor[akka://system/user/$k/payment-initiator/$a/$e#-...])) reason=expiry too big. maximum=cltvexpiry(773797) actual=cltvexpiry(773813) blockcount=772789

This happens when I do the following on robosats:

set buy order parameters

click create order

asked to lock sats to publish orders

click copy to clipboard

load phoenix

click send

paste from clipboard

click pay

Why is this happening?

I set the order to expire after 8 hours.