If you guys on Slack or other forums know more about this situation, please keep us in the loop.
git pull in sentinel folder. no restart needed
Technically the nodes are not down, they just failed to vote on a watchdog object.
As a sidenote: Dash 12.2 will not have watchdogs anymore, they are deprecated.
This is required or your Masternode will go offline!
(edit: Apparently w/spork 14 off this isn't enforce, so crisis averted!)
Sentinel should not be executed, it must be interpreted in a virtual environment. If you run /venv/bin/python bin/sentinel.py and get no output, then everything is working perfectly and your masternode is alive, online and recognised by the network.