Text entry bug in latest update
I discovered a bug in Storyline 360 today, which has been reported. If you have a text entry field it will stay 'on top' of any layers you have on that slide (including master slides).
For example, if you have a text entry field on the base layer and a popup window as a layer, when you open the popup window the text entry field will be on top of the layer. Here's a link to a Peek video to demonstrate what I mean:
This has been reported as a bug, so hopefully there'll be a fix for it soon. In the meantime there's a workaround of preventing the user from clicking on the base layer, although this isn't always preferable.
UPDATE: This appears to be another bug with a recent update, as modules we designed in a previous version of Storyline aren't affected by it.