I was seeing the same issue. The problem only appears when using Chrome 65 (currently: dev channel). With Chrome 64 (both stable channel and beta channel) everything worked fine.
It turns out I had an old chromedriver installed. Specifically, I was using chrome=65.0.3325.51
with chromedriver=2.29.461585
. Running npm install -g chromedriver
bumped chromedriver to 2.35.528157 and now the problem is solved. Hope this helps!
TL;DR: run npm install -g chromedriver