Was the 2022 tax return not able to claim the loss due to the lack of Basis?  That would be the most common reason why a 2022 loss would show up on a 2023 tax return (if Basis was restored).

However, you said 2023 had a loss, so unless contributions were made (or some other way to increase Basis), then the losses would not have been able to be used.  That leads me to suspect it was a mistake.

At any rate, looking at Basis for both years (and if the 2022 tax return allowed the loss) is the first thing I would look at.