If I use a substr to select that character it returns an empty, but not null string. I cannot manually select the value of the cell. By copy and pasting the output into excel, I can select the space and an online decoder indicates that is a \x20 character.

If I concat a bunch of the same substr the value returned has spaces that I can select. By copy and pasting in a online decoder I manage to identify the characters \x0A\x20. An line feed followed by space(s). It always starts with \x0A and then X times \x20 being X the number of substr that I concated minus 1. The first substr is unselectable.

I think that these spaces should always be visible and selectable.