Hi, I spotted in the Plot tab of flair a little weird behavior, at least I think so. When 1D-plotting a certain USRBIN along y, then selecting another USRBIN, and then going back to the previous USRBIN, the selection changes by itself from y to z. Please have a look at the following screenshots, which show the sequence I mentioned. I also upload the project in case you want to check it by yourselves.
P.S. The same does not happen if the first selection is x instead of y: the selection of x is kept on switching USRBINs.
I could reproduce the problem. The limits min/max Z values were propagated from the last USRBIN plot fluenza 2D in R0 coord xy
to the previous one fluenza 2D in R0, when I had no usrbin available.
It is fixed now on the development version of flair, we will push a correction of this bug among other things in about 2 weeks time