Why do my screens go black randomly?

Recently I bought a new 3ds, plenty of fun, but as of the last few days, I’ve noticed a reoccurring issue.

When I place my 3ds in a certain position while playing games, both the main screen and the touch screen go black. No sound can be heard but the power doesn’t go off. A similar issue I’ve seen online is the black screen of death, but when I reposition the system, the game continues right where it left off.

I don’t want to crack this thing open just yet and it is entirely functional and playable most of the time, but I’m concerned as this has already happened twice in the last two days. What could be causing this issue?