Today I have just updated my dependencies of material design
dependencies
material design
from 1.0.0 to 1.1.0-alpha09
1.0.0
1.1.0-alpha09
implementa
Set this in your TextInputLayout:
app:boxBackgroundMode="none"
Probably you have set boxBackgroundMode to filled or maybe it's set by default. Just add above line, and this should fix the issue.