The singer-songwriter sits on the panel of the popular TV talent contest, alongside Boy George, Kelly Rowland, and Delta Goodrem, and he told Australia's Sydney Morning Herald "there's unresolved feelings" following the "massive argument".
While the former Australian Idol star mentioned the incident was instigated by one of the "girls", he did not specify whether it was Delta or Kelly.
Guy said the judges haven't been able to see each other face-to-face since the dispute, so the issue has yet to be resolved.
"I'm not one of those people who can go, 'Oh, what happens on the set stays on the set', I don't believe that," he told the publication. "Whenever there's an argument, or it gets personal and nasty, I withdraw and I struggle to get over it."
The Voice filmed the blind audition stage of the show before the COVID-19 crisis was declared a pandemic in March.
Earlier this month, it was reported Kelly and Boy George may be replaced by stand-in coaches, or they could mentor their acts virtually while remaining in America and England, respectively.