Copy-pasting images from a Chromium-based browser (tested with Vivaldi & Brave - Windows 11) to NN fails. Only the outline of the image shows up at the note and the actual image data/ attachment does not get uploaded at all. At the same time, copy-pasting from Firefox-based browsers to NN works ok (tested with WaterFox & Mullvad Browser). Also, if you copy paste from a Chromium-based browsers to another app first (like Windows Paint), then you can re-copy the image and paste it to NN succesfully.
Possibly something to do with image formats / clipboard encoding used by different apps? @molten lodge please check.