Ships losing power is not uncommon, Columbia River bar pilot says

River Mersey Pilot Boat going slowly inbound on the river before turning and heading northbound again.

Shortly after 5 a.m. local time the vessel “Else” had a collision in the Kiel-Holtenau lock to the Kiel Canal.
The "Else" subject to pilotage passed the pilot's boarding position without taking a sea pilot on board and collided from the outside into the closed gate of the new north lock. The bow bored into the metal construction and the ship was stuck for about six hours.
For more information about this accident see related content below (articles).

Product tanker NORTHSEA RATIONAL in load contacted embankment in Neumuelen, Hamburg, in the morning Nov 25, while maneuvering to berth, according to FleetMon.
It stated: “Tanker sustained serious damages to starboard bow, cause of accident yet unknown.
“She was berthed after accident, and as of evening Nov 25, remained, berthed. There was no hull breach in cargo tanks area, no cargo loss reported.”

According to various reports, the motor vessel "Else" damaged the gate of the Kiel-Holtenau lock at 5:00 a.m. on 29 August when it entered the closed gate without a pilot.

Take a look at the first UK 'hybrid' pilot boat built in the UK by Goodchild Marine for the Port of London Authority. Video from 2019.