I'm not sure where the issue is exactly, but I suspect its something to do with different standards of storing images in clipboards. If you see the images, this is a screenshot of an Excel grid, taken using win 11 snap tool (shift+win+s). I paste this into paint.net (5.0.12) Then select all and copy/paste into Confluence using Firefox. The edges of the images are either shifted, or a line is added. If I use paint instead of paint.net, it is ok. If i use edge instead of Firefox, it is ok. Saving the file as png and importing it and its ok. Pasting from paint.net into powerpoint and its ok. Any ideas what is causing this or how to fix it? I'm going to ask atlassin (confluence) and paint.net help as well.