Open this file. zoom in and select the yellow arc. apply a 3d extrusion effect. no copy the "adlucent" extrusion style to the arc. now select the image background and notice the cursor change. now notice how it locks the tool and it's glitchy and difficult to select other tools or zoom in.
please confirm.
https://www.dropbox.com/s/y5owk6rjx3cw0aq/section%20bug.cdr?dl=0
Sorry grogo, I can not recreate, it seems to work here.
It's a tricky one and I managed to recreate it on another computer. I reckon I can post a video capture.
Please do, it is possible that I'm doing something wrong.