Thank you for writing.
Due to the UI virtualization in RadGridView
, cell elements are created only for currently visible cells and are being reused during operations like scrolling, filtering, grouping and so on. In order to prevent applying the formatting to other columns' cell elements (because of the cell reuse) all customization should be reset for the rest of the cell elements. Please refer to our Formatting Cells
help article. I have prepared a sample project for your convenience.
I hope this information helps. Should you have further questions, I would be glad to help.