existing chrome instances block launch

ubuntu 18.04, chrome 72

when using pkg . --target node10-linux-x64 and a chrome browser instance is already running:

Could not start the browser or the browser was already running with the given profile.

• Without the browser already running, it works fine.
• dev builds are fine independent of browser running or not
• tried the fix suggested in #105, no luck
• specifying --profile-directory & --user-data-dir in launch args key also fails