When I use the new Position Sticky feature in Prototyping, the frame that sticks to the top always sits below the frames that scroll. This doesn’t make sense because the point of sticking a frame is so that it sits on top of all scrolling content.
Do I have to re-order the layers somehow? Do I have to check an extra box to make the frame sit on top of all others?
Thank you
UPDATE: I finally found it!!!
You need to set the parent frame to “First on Top” which is deeply and frustratingly hidden in the “Ellipsis” (go figure) in Auto-Layout. OMFG
OMG Thank you!!! I was losing it
Thank you!!! same here
Thank you so much @James_Stables !
I spent almost 2 hours trying to figure this out! 
Thanks a ton @James_Stables You saved me a lot of time!
Thank you so much man!
Thank you! You saved me a lot of time too!
Thank you I set the content I wanted to be on top to “First on Top” but I forgot to do it on the parent frame. Now it works nicely 
You are life saver! 
Thanks man! Another thing I have noticed is that the positioning of the sticky scroll is limited by the height of the parent container. For example, a sticky navbar is positioned above a hero banner, with both contained inside a header. The scrolling interrupts the sticky header based on the height of the header.
OMFG, you saved my life here!!
You saved my life. Thank you.
OH MY GOD i was losing my mind over this, you olved it for me tysm. this was so frustrating jfc