I use UDOBot 4.0.1 with 6 accounts at the same time and sometimes the ships stop on dangerous zones (not portals) and don't search any more until I click on the map to move the ship manually.
Maybe the problem is a fail on the coverage of my WiFi, but the ship will have to continue moving later, and don't do it.
It is needed a function to restart the bot when it gets frozen.