Sometimes my Numbus Clarity windows client doesn't start properly.

I can see 3 processes on task manager with its name, but the app never shows on notification área and the screenshot shortcut don't respond as expected.

Killing the tasks (on task manager) and restarting the app solves the issue most of the times, but sometimes it doesn't. It appears to me that whenever it tries to load without internet connection or behind a firewall that might block a request, it's triggering this behavior.

Is there a way to troubleshoot this?