"Experts" at work again. Clickbait. Stupid simple answer to the mystery: Glacial isostatic adjustment.
The poor sap was buried on one of the now sunken islands and he finally floated free.
But they don't want to talk about sinking islands, only 'rising oceans'.
Idgits.
Someone needs to contact Democrat representative Hank Johnson. This may be a case of an island capsizing, just as Hank warned Guam could do if too many Marines were stationed on one side.