I’m not even sure if this is a context-menu exactly, but I can drag it around the mobile screen and it doesn’t do anything when you click it. Is there a way to remove this from mobile projects?
Thanks in advance for any help.
I’ve attached an image of what it looks like, but cannot find the setting to remove this.
There’s no attachment.
My apologies, guess it failed the upload. I’m adding it again now.
No clue what it is but here’s what you can do to identify it.
The reflector should display the widget’s name in the Widget Info column.
Now that you know what you’re looking for, you can hit ctrl+f and search for it. Use the binoculars icon to Find in All Blueprints. Double clicking an item in the list will take you directly to the node that spawned it.
So the only issue with this solution (thank you for the time in posting it though!), is that it only shows up once deployed to an Android phone. It doesn’t show up during PC (PIE) or Mobile (PIE) only once on an Android phone. We haven’t tested it on iOS yet, but so far on our HTC and various other Android test devices, it shows up always in the bottom right corner. It can be dragged and dropped, but doesn’t do anything, even if clicked.
Which makes me wonder, if I deploy it to our Android devices as Production and not Development, if it’ll make a difference. Will test this out and respond if I get anything new.
In that case, it is unlikely to be a part of UMG or UE4. Some kind of Android SDK overlay perhaps? Looks a bit like an overflow menu.
Wish I could help more 
Not my area of expertise.