Paypal: A token with hash could not be found

[StefanGlaesser]

Hello,

in the last 4 days we got 2 payments from different buyers but our orders in our cart system were not triggered. The carts of the buyers were still existent that we can reproduce what they want to buy. But how can this happens? The only thing we found in our logfiles were that messages above.

We're receiving many orders with paypal every day so that it's not a general error. The error happens only sometimes (and at first 4 days before).

Any ideas?