Check the video posted above.
They backed out from the quay they were moored at and then for some reason they could not start going forward.
If I was aware of any current going up river I would have had a tug connected in case the improbable happened that my ship became impossible to control.
Moving water in closed areas (rivers) can get ugly real quick ..
At this time they should be making way forward, down river, but the churned up water indicates
that their propeller is still going astern (watch video to see sequences):
A little bit later, having a fair bit of speed going astern:
A decent “bow wave” at the rudder going astern.
I would guess at a technical failure
BUT
if the current and the wind was going up river I would have had a tug connected at the bow as a safety precaution. Pride or no pride, safety first.