Confirmed in Linux Mint in 3.3.0, 4.2.4 and 4.3 beta. When attempting to click the second graphic object while holding on shift, the selection jumps to the image and deselect the first selection.
Confirmed in Linux Mint in 3.3.0, 4.2.4 and 4.3 beta. When attempting to click the second graphic object while holding on shift, the selection jumps to the image and deselect the first selection.