IndPeriod_Plot not working as expected

When trying to plot OutputsModel on a reduced period, i.e. for a zoom, the argument IndPeriod_Plot does not do what I expect. I give him my indices (e.g. 200:400), and instead of plotting these time steps, it plots time steps 1 to 201. I think it comes from the use of seq_along (lines 23 and 25 of the plot.OutputsModel function), which does not seem necessary.

Still it's strange, as I remember it did what I expected in the past...