It looks like the Nintendo Switch only records gameplay data for up to one year. The news comes on the one year anniversary on the Nintendo Switch. Reset Era member Executive Taxi has noticed that play times of day one launch titles have been reset which is disappointing. Nintendo is aware of the issue and will inform us when they know more.
Some Nintendo Switch owners’ play activity information is displaying incorrectly. We are aware of the issue and we expect to have more information to share in the near future.— Nintendo of America (@NintendoAmerica) March 3, 2018