Sometimes when I double click on an effect in an FX bin it deletes it

Does anyone else have this occasional problem? I double click on an effect in an FX Bin and instead of bringing up the plug's interface, the whole effect just disappears. Really not sure if this is a bug or whether I'm just inadvertently clicking the wrong way. I did think that maybe I'm accidentally catching the right mouse button and then triggering "delete" on the popup menu, but then again I can honestly say no menu appears, not even for a split second, and when I try and recreate that behavior slowly, I can't even do it because the popup appears in such a position that my mouse pointer is nowhere near the "delete" option. 

I mean it's no biggie because you can always CTRL-Z your effect back, but it does make for one of those brief  moments.