Happenned to me 2 times in 3 years and 1 day playing with Bayern. Is a fail of the srver, not a robbery of Nordeus, think that the servers are who make the game work, and fails can ocurr because are machines.
Fail can be for a bad sinchro between your PC and the server time, or maybe as happenned to me game started but server was not capable to save the result, so had to do a simulation because the info of the match don't exist in these cases, not saved so, lost.
As players all we know that can happen, 1 time maybe in 15 seasons let's say, but can happen.