Hmmm. The front bezel looks a bit substantial to be deformed by bubbles or lumps, but I suppose it could be that.
The "feel" is very slight, but as noted here:
https://www.universityofcalifornia.e...ty-human-touch
"Sensitive enough to feel the difference between surfaces that differ
by just a single layer of molecules, a team of researchers at the University of California, San Diego has shown."