Hey, I was wondering the same thing - transparent tooltips just do not like being selected! 

I found a bit of a workaround that has worked well for me to far.  Rather than making the fill color of the trigger transparent (or opacity =0), I choose an easily distinguishable color and set opacity to 1. This really doesn't affect the color of the photo/text and allows you to select the trigger like normal.  I usually need to click multiple times to select the trigger, but at least it pops up.

Hope this helps - it's saved me a lot of aggravation of having to put everything in place perfectly the first time.

-TheDashingRogue

Yes...I love the concept of Tooltips....but boy, you have to have the patience, and persistence, of Job to get them to work like they are supposed to.

I do hope the team is continuing to work/refine this because there are lots of things that make the actual using of it quite a challenge.  Selection is the main problem...if you could fix that, other stuff would be less problematic I think.  And then, if you accidentally have them in wrong order, easy to do b/c of the selection issue, then autoplay will show them out of order.  And choosing the entire "composition" box is near impossible I've found after you remove the fill of the trigger.

Also, have to choose, select, edit and move very carefull or for some reason the text frame/target takes on life of its own...that has caused me quite a bit of time.

And, never seems to work when I try to do anything in multiples -- I have 12 images on home page that the tooltips are being used on and I finally had to just go to each trigger and each state to remove the fill...didn't work when tried doing so all at once.

So great concept that definitely needs refining before it is polished.