unfortunatly we're running again into issues with the spreadsheet component. We tested this with our app and your example (https://www.igniteui.com/spreadsheet/loading-data) as well.
When opening an existing xlsx-File the images in that File get interchanged, when scrolling around the images tend to flicker and interchange (somewhat hard to describe). The displayed images are always the same, while not necessary the one in the following example (feels like the displayed image is picked randomly).Here is a screenshot from Excel (how it should look like) and what it looks like with igSpreadsheet:
I'm also providing the xlsx to reproduce it with:Mappe1.xlsx