Hi DATA_309 ,
It's difficult to tell without looking at your data, but I suspect that W is below baselines. I would check that channel in the Time Series View, and check what the baseline splines look like (they may be above the data). If that is the case, you can add/adjust baseline selections so that the splines are no longer above the image data.
If that is not the case, please let us know.
-Bence
