HI,

I have simple filter In column A mark all from column B (=countif($B:$B;$A1)).
Cells are now coloured.
Now I try to filter based on colure (it does not matter).
So I click on first cell , click on filter (I do not even chose which filter). I’m trying to filter.
Now excel start flickering , at the top white stripe, and alternative to cell where I try to apply filter. Sometimes this repeats few times, sometimes more.
What is annoying, that at the end filter do shows, and close emidiatly, so I have to go through this process several times.

I have disable and enable Hardware acceleration...

Br,
Borut