Button text is underlined

[Stéphane B.]

I tried to fix it but I didnt find why it's happening. On the second displayed snackbar, the button text is underlined.
I use your library in my application. You can find the source code here to reproduce the issue.
https://github.com/StephaneBg/ScoreItProject

Other problem, long click on the button shows "Paste" system tooltip.