Fans of Robert Irwin have weighed in on what they believe was the real red flag in the Wildlife Warrior's ill-fated romance with ex-girlfriend Rorie Buckey. 

Robert, 20, raised eyebrows on Sunday when he shared a video to Instagram joking about how he'd overlooked a huge 'red flag'.

His statement related to a grammatical error in a sign at Australia Zoo which read 'Danger: No swimming Crocodiles'.

His use of the term 'red flag' subsequently kicked off an online discussion about the red flags in his two-year relationship with Rorie, which ended in February. 

Many users have speculated that Robert's famously protective 'momager' Terri could have contributed to the split, with one commenting: 'Mummy's the red flag'. 

'Biggest red flag for Robert is his mother,' another agreed, before pointing out that Terri had accompanied her son to South Africa while he hosted I'm A Celebrity... Get Me Out Of Here! 

'Doesn't his mum still follow him around?' someone else wrote, while a fourth added: 'He need to untie himself from his mothers apron strings. He's no longer 10 years old.' 

Others suggested his sister Bindi, who has always had a very close bond with Robert, may have also had a hand in the breakup.

'Poor girl missed the red flags of mummy dearest and sister. A lucky escape for her,' one wrote. 

It comes after an I'm A Celebrity... Get Me Out Of Here! producer expressed concerns about Robert's decision to bring his mother on set. 

Terri accompanied her son on his trip to South Africa as he filmed his debut season of the popular Channel 10 program alongside co-host Julia Morris. 

Speaking exclusively to Daily Mail Australia earlier this month, an anonymous producer admitted that Terri's presence on set every day was 'giving 'bringing your-mum-to-school-camp vibes.'

Terri, who has been in charge of Robert and his big sister Bindi's showbiz careers since the death of their father Steve in 2006, has apparently kept a close eye on everything Robert does while working on the program. 

'The two have an excellent relationship and Terri couldn't be nicer, but there are not many situations where employees will have their mum at work with them, just to make sure everything is above board,' the insider said. 

Comparing Terri to the Kardashians' famous 'momager' Kris Jenner, the producer claimed Robert Irwin's contract even included a section that allowed him to bring his family on set. 

'The deal was done when Robert signed on as host late last year. He wanted his family to come with him,' they alleged, adding: 'Maybe it will be just for this series,  but maybe Terri will always be standing in the wings. Who knows'.  

Robert and Rorie announced their split in February, posting a joint statement to Instagram. 

The statement read: 'We wanted to share that we have decided to go our separate ways but profoundly appreciate all the time spent together and wish one another all the very best into the future. 

'We wish to express the gratitude and respect we have for one another as we continue our journeys on different paths.

'We won't be commenting further on this, and really appreciate your respect and privacy at this time.'

After sharing the devastating news, Robert erased Rorie from his Instagram as his grid now only shows posts featuring himself and his family.