Oh boy. https://github.com/signalapp/Signal-Desktop/issues/1635
tl;dr Signal Desktop is based on Electron, which in turn is based on Chromium 58-59, and it seems to be affected by bugs that have been fixed in Chrome/Chromium 60-62.
Gotta love #Electron. As somebody said "now everyone is running 5 different instances of old insecure versions of the most scrutinized and attacked application on Earth."
Bobinas P4G is a social network. It runs on GNU social, version 2.0.1-beta0, available under the GNU Affero General Public License.
All Bobinas P4G content and data are available under the Creative Commons Attribution 3.0 license.