No cause info.
The 19 knot speed is also in a DNV paper
and seems much more likely than the 14 knot.
This was a membrane ship, so pushing up the outer hull
undoubtedly pushed up the containment system
as one of the MSC83/INF.3 sources says.
But apparently the cargo tanks were not breached.
Dont know which harbor gave the ship refuge
and a place to do the transfer.
Unlikely this would happen today.