Only one instance of wavedrom-editor can be launched at the same time

[rbarzic]

Ubuntu 18.04 LTS, using wavedrom-editor-v1.6.3-linux-x64.tar.gz

I can launch an instance of wavedrom-editor without issue, but trying to launch a second one fails with the following message:

Created new window in existing browser session.
[27843:27869:1205/122659.622553:ERROR:browser_gpu_channel_host_factory.cc(121)] Failed to launch GPU process.

[drom]

Try running it specifying different work folder:
wavedrom-editor --user-data-dir=/tmp/