[TableView] Filter on icons

Hi,

I have a TableView displayed using an iterator. Basically, some columns referred to flags and, thus, contain an 'X' or space. The iterator looks at their values and display a green led or a red led accordingly.

The problem is that I don't understand how the filtering is working (or, even if it could) for icons ??

I tried 'X' and ' ', and it does not filter.

But, strangely, 'a' and 'b' are filtering some entries but not all...

I must acknowledge I am getting quite confused with this.

Any idea apart from removing the icons ?

Thanks in advance !

Best regards,

Guillaume