This bug has been duplicated in my test quest, available here.
I was messing around a bit with Sarpadia earlier today when I noticed the Lens not only revealed, but triggered a series of blocks with bomb flags (#6) on them. I could not duplicate this bug in my test quest but I found something else amiss...
Notice it's showing the wooden sword as the trigger instead of a bomb. This is before I picked up any bombs at all.
Now, after picking up some bombs, the correct bomb trigger appears (but doesn't go off as it did in Sarpadia).
I've also noticed some strange, seemingly random sounds playing when using the Lens. Once it was the "secret" SFX, another time it was the "repel" sound (for lack of a better description - think hitting a Darknut with a boomerang).