It was after England's opening Group A win over their Ashes rivals in Birmingham that Warner reportedly misread the significance of a wig which found its way on Root's chin.
Warner was fined by his employers and banned for the remainder of the global tournament and two first-class matches preceding this summer's Ashes. England had good reason again to celebrate in Wales on Sunday night - and did so too - thanks to their 10-run win over New Zealand which secured their progress to the semi-finals.
Unsurprisingly, there was no sign of them afterwards in either the 'Walkabout' or even the 'Kiwi' bar in central Cardiff. But asked whether they were still free to toast their victory, with two full days at least before their next match, off-spinner James Tredwell said: "Yes. Obviously the eye is firmly on us now.
"I think the lads understand they've got to be careful - and equally we know we've got some important games coming up. So although we did celebrate and we wanted to celebrate it - that's an important thing for a team, and the boys certainly did that - we don't want more things coming up on the team, because that could be damaging."
England's week of ups and downs might have easily culminated in the latter, had rain not relented long enough to allow a 24-overs-per-side match against the Kiwis. It was therefore to England's credit that they kept their composure in a contest which began amid a 'ball-tampering' row after former captain Bob Willis had accused them of such.
Tredwell acknowledged it was hardly the perfect preparation, adding nonetheless that Alastair Cook's team merely pull closer together in such circumstances. He said: "It does unify us, I guess, but equally you don't want it around. I think we're a pretty strong unit as a team, and we want that to continue."
Tredwell has deputised impressively during first-choice off-spinner Graeme Swann's injury-enforced absences in two of England's three Champions Trophy matches so far.
His appearances have coincided with victories too, a factor he has yet to mention to coach Ashley Giles - with a view to continued involvement.
"I haven't yet, but I think he's is pretty aware of that too," he said.