Is there a bug in ListBox Sort By Expression option?

[#1]

When I have a listbox, and I try to insert an expressions into the listbox, the order changes every time a value is clicked.

This is true even is Sort By State option is off.

I've attached an App where I have just one table with one column, Year. When I put the values of that table into a listbox and they sort it by Year using the expression =Year. When I do that, every time I click on the listbox the order changes.

Why is that happening? Seems like its the opposite of what is suppose to happen.

[MK_QSL]

Go to Sort Tab

Only Select Numeric Value

Ascending / Descending Order

Or as per your Expression

Change the expression from =Year to =Only(Year)