Chromium snap locking up a CPU core 100%

Since the last update 4 days ago Chromium is locking up on start as soon as you click on it.

snap info chromium
name:      chromium
summary:   Chromium web browser, open-source version of Chrome
publisher: Canonical✓
contact:   https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bugs?field.tag=snap
license:   unset
description: |
  An open-source browser project that aims to build a safer, faster, and more stable way for all
  Internet users to experience the web.
commands:
  - chromium.chromedriver
  - chromium
snap-id:      XKEcBqPM06H1Z7zGOdG5fbICuf8NWK5R
tracking:     stable
refresh-date: 4 days ago, at 20:36 BST
channels:
  stable:    75.0.3770.142 2019-07-22 (796) 159MB -
  candidate: 75.0.3770.142 2019-07-16 (796) 159MB -
  beta:      76.0.3809.80  2019-07-25 (807) 156MB -
  edge:      77.0.3860.5   2019-07-25 (806) 163MB -
installed:   75.0.3770.142            (796) 159MB -

This is what I get when running it from the command line.

snap run chromium 
Gtk-Message: 09:52:34.494: Failed to load module "canberra-gtk-module"
Gtk-Message: 09:52:34.495: Failed to load module "canberra-gtk-module"
[21501:21501:0726/095234.590247:ERROR:create_gr_gl_interface.cc(131)] Failed to initialize extensions
[21501:21501:0726/095234.592915:ERROR:create_gr_gl_interface.cc(131)] Failed to initialize extensions
[21501:21501:0726/095234.593630:ERROR:sandbox_linux.cc(368)] InitializeSandbox() called with multiple threads in process gpu-process.
[21501:21501:0726/095234.781754:ERROR:raster_command_buffer_stub.cc(112)] Failed to Initialize GL for SharedContextState
[21501:21501:0726/095234.804926:ERROR:raster_command_buffer_stub.cc(112)] Failed to Initialize GL for SharedContextState
[21501:21501:0726/095235.191819:ERROR:context_group.cc(190)] ContextResult::kFatalFailure: maximum renderbuffer size too small (0, should be 512).
[21501:21501:0726/095235.193272:ERROR:context_group.cc(190)] ContextResult::kFatalFailure: maximum renderbuffer size too small (0, should be 512).
[21501:21501:0726/095235.195109:ERROR:context_group.cc(190)] ContextResult::kFatalFailure: maximum renderbuffer size too small (0, should be 512).
^C

Obviously some weird GL rendering problem. FTR I am on a Entroware Kratos so have Intel native graphics and Nvidia external ones. I only fire up Nvidia by hand for games. Otherwise everything is ok with Intel.

Ideas?