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Salford, who have also been charged for improper conduct, won the match 26-24.
However, after the game, winger Justin Carney and centre Junior S'au were pictured in heated exchanges with fans as they tried to protect their children in the crowd at John Smith's Stadium.
A flare was reportedly thrown in the Salford end moments before the trouble.
The Red Devils did apologise for the actions of their fans, while owner Marwan Koukash promised to act against the fans involved.
An independent tribunal will hear the case, with a hearing date set for either late June or July.

The Yemeni troops, along with a force of local tribesman, were backed by the United Arab Emirates and US forces.
The US views Al-Qaeda in the Arabian Peninsula (AQAP) as the most dangerous wing of the terror group.
AQAP has taken advantage of the chaos of the Yemeni civil war to expand in the oil and gas rich south.
The aim of the mission was to "degrade" AQAP's abilities, Pentagon spokesman Navy Captain Jeff Davis said.
But local people said the militants did not put up a fight, and simply melted away into the mountains.
As a result, the province's main cities are said to be under government control for the first time in years.

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The Imps have reached the last 16 for the first time in 130 years.
Victory on Saturday would see them become the first non-league team to reach the quarter-finals since 1925.
"If we're realistic, we'd probably only beat them once in a hundred times but we've got to believe this is that one game," boss Danny Cowley said.
"We're going to be brave, we're going to fight and give it one hell of a go. If we do all of those things, we might give ourselves that chance.
"We've achieved the impossible to get here, we've just got to go and do it again."
Lincoln beat League One side Oldham and Championship teams Ipswich and Brighton to become the third non-league team to reach the fifth round since the turn of the century, after Crawley Town in 2010-11 and Luton Town in 2012-13.
Cowley, whose assistant at Lincoln is his brother Nicky, said that the competition had "fast-tracked our development."
"It's been brilliant and whenever this cup run ends, we will cherish what we have learned from it," he added. "It will hold us in really good stead for all of our futures."
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It's not too late to enter this year's FA People's Cup - as long as you do it by the deadline anyway - and that is at midnight on Sunday.
Entry is completely FREE, there are categories for everyone AND you can enter either as a team or an individual player.
Find out all the details here.
Salford Red Devils have been charged by the Rugby Football League for the misconduct of their supporters at Huddersfield Giants on 28 March.
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Forces backing Yemen's government have reportedly driven al-Qaeda fighters out of the main cities of the southern province of Shabwa.
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National League leaders Lincoln City will aim to "achieve the impossible" against Premier League side Burnley in the FA Cup fifth round.