*sigh* Storyline once again is glitching

So I'm simply trying to place an object in the very front of many other objects, and for whatever reason (go figure), as soon as I drag it to the position I want it in, the object disappears behind another object and disappears from the timeline altogether where I can't even track it. 

What's going on here?

(Yes, there's always a (tedious) workaround, and I can simply create a new shape instead of duplicating another object to exist as a new object, but that takes more time, and time is precious, and efficiency is always critical.)

EDIT: Suddenly, it's just the copy + paste function that's not working anymore. Any new object that's created from duplication just disappears after being dragged. Unbelievable...