sigle click contextual menu not showing after image manipulation

[alixturcq]

Hi, I am hosting hotglue on my own server and i noticed a rather simple issue :
i import a few images and arrange them around the space (dragging, scaling). Then when i want to import more images after that, the import button is not appearing when i'm clicking on blank space and i have to refresh page to get it to appear when i click (same spot). I noticed that it still appeared when i clicked near some content, but not in a large empty blank space !

It's not really a problem but i thought i should let you know ! I can do more tests if needed, don't hesitate to ask

alix