Déjà vu all over again.
Just two weeks on from what appeared to be a seismic turnaround victory against South Africa, the All Blacks have come crashing back to earth, defeated 25-18 by Argentina in Christchurch.
The win at Ellis Park gave New Zealand Rugby the confidence to back Foster through to the 2023 World Cup at the very least, but Saturday's loss leaves the All Blacks on shaky ground.
Since the 2021 end of year tour, the All Blacks have lost six of their last eight test matches, with the Foster merry-go-round in full motion again.
And with another test against Argentina next weekend followed by a home and away Bledisloe Cup quest against Australia, things won't get easier for the under-fire All Blacks any time soon.
What the press said:
Christy Doran, Fox Sports
'Focus back on Foster'
The defeat immediately turns the focus back on Foster, who was confirmed through to the World Cup by New Zealand Rugby less than two weeks ago.
His backing by New Zealand Rugby CEO Mark Robinson came after the All Blacks beat the Springboks 35-23 at Ellis Park to snap a three-match losing streak.
The fallout will be immense, with the defeat coming in Christchurch - the city that Scott 'Razor' Robertson calls home, and where he has led the Crusaders to six Super Rugby titles since taking over in 2017.
SuperSport
'Expect more severe criticism'
The home side, who squandered an early 15-6 lead, have now lost six of their last eight Tests and can expect more severe criticism after the pressure had eased following their last-start 35-23 defeat of the Springboks in Johannesburg.
They have lost three successive Tests at home for the first time following successive defeats against Ireland last month and it could be four on the trot if they succumb again to the Pumas in Hamilton next week.
New Zealand Rugby can expect to come under the blowtorch from its critics after its decision last week to reappoint Foster, despite the head coach's dreadful record by All Blacks standards.
AFP
'Plunged back into crisis'
The Pumas achieved their first-ever win over New Zealand just two years ago in another championship match in Sydney and Saturday's victory was from the same mold with magnificent defence backed up by iron discipline.
New Zealand, who played the last nine minutes with 14 men after Shannon Frizell was shown a yellow card, will almost certainly be plunged back into the crisis that was apparently ended by their victory over South Africa two weeks ago.
Tries from Samisoni Taukei'aho and Caleb Clarke should have given them a comfortable lead at halftime but ill-discipline throughout the match cost them dearly.
Colin Newboult, PlanetRugby
'More unwanted history'
Ian Foster made more unwanted history as New Zealand head coach as they became the first All Blacks team to lose to Argentina at home.
Foster received a stay of execution following their victory over South Africa but this result is a catastrophe for both the head coach and the governing body.
However, although there will be plenty of fallout from this abject defeat, all the credit has to go to Los Pumas, who were once again utterly magnificent.
Two weeks after their record-breaking victory over Australia, they went to the home of the three-time world champions and produced another incredible effort.
How social media reacted:
