Sounds like the 510 connector shorted out, and then cause arcing between the mod body. This would weld the two connectors together, and the protection should have cut it off, but perhaps the load limit to activate this wasnt reached and hence the result.
Can you recall if the mod terminals and those on the atomiser were dry, and not covered in juice? this could also result in a short, depending on the electrical conductivity of the juice in question.
Can you recall if the mod terminals and those on the atomiser were dry, and not covered in juice? this could also result in a short, depending on the electrical conductivity of the juice in question.