The champion NRL winger had arrived at Ballymore fresh off a premiership with the Melbourne Storm as Rugby Australia's big-ticket item.
But on Tuesday the winger copped a club-imposed A$10,000 (NZ$10,74) fine alongside suspension from Friday's season opener at Suncorp Stadium against the NSW Waratahs.
The matter is before the court and will be reviewed by RA and Queensland Rugby Union once it is resolved.
It is understood the security guard was not injured during the incident, which was considered minor and occurred earlier this month.
Vunivalu was implicated in an NRL integrity unity investigation in 2019 when he was allegedly a victim of a coward punch at a Bali nightspot that sparked a brawl that included former Storm teammate Nelson Asofa-Solomona.
The 26-year-old had already spent time in camp with the Wallabies and is considered an immense talent likely to feature in national coach Dave Rennie's plans ahead of the 2023 World Cup.
It's an early setback for a Reds outfit hunting their first silverware since 2011, having lost the Super Rugby AU decider to the Brumbies last year.