Slicer visual problem

Hi,

I have already checked most of your suggestions, but I have concluded that the data has been loaded correctly—it simply isn't being displayed correctly.
If I sort the list in ascending order, I see one half; if I sort it in descending order, I see the other half.
If I use the search function, I can find all the values—they just aren't all displayed at the same time.
I could add a new column with at switch beween the 2 types, and it worked

I was simply wondering whether this is a new feature or something that looks like a bug.

Thanks for the help.