Failing Galvanic Isolators leading to dangerous situations and not protecting against any safety
hazards at all is just typical for it. Method of correction: into the dumpster with it and install a proper isolation transformer. It will protect against all the hazards for the boat
AND her crew. When installed correctly, that is.
Aboard Jedi it was installed incorrectly by the yard as it was original equipment
: if you have one and never checked if it is actually isolating then now is the time to do that