Opening blank tab page freezes Brave

Every time I create a new blank tab (click the + to the right of the existing tabs) Brave will not respond for several seconds (I get a ‘not responding message’). After 30 seconds or so I can then use Brave. It happens all the time. I have Windows 10 1803 and Brave Version 0.55.6 Chromium: 70.0.3538.16 (Official Build) dev (64-bit).