Microsoft ToDo: Image/Picture insert from Clipboard #Bug

if I insert a pic from clipboard (source Irfan-view) the size in Microsoft ToDo is always up to 5 times greater then the saved picture to Filesystem.

If I insert the pic from Filesystem, all good. Copy/Paste must be have a bug in MS-ToDo. e.g. 100KB-File pasting it shows and uses 1MB.