Twitter Went Wild Over Meghan Markle Allegedly Breaking Protocol with a Tiny Wardrobe Malfunction

Meghan Markle has dealt with plenty of public scrutiny since the beginning of her relationship with Prince Harry, and a blink-and-you-miss-it wardrobe malfunction is no exception.

The newlywed celebrated her 37th birthday on Saturday by attending the wedding of Harry’s longtime pal, Charlie van Straubenzee, to Daisy Jenks. However, an undone top button combined with a friendly wave to the crowd revealed that Meghan was sporting a black lace camisole under her color-block, pleated shirtdress from Club Monaco.

“Meghan at a wedding: black dress, waving at the cameras, with her bra showing. I thought Meghan was supposed to be smart??” wrote one Twitter user following the accidental slip.

  • Can’t get enough of PEOPLE’s Royals coverage? Sign up for our newsletter to get the latest updates on Kate Middleton, Meghan Markle and more!

Despite Meghan re-securing the top button, others accused the not-so-royal moment of being “deliberate.”

“Meghan stole the show with her deliberate wardrobe malfunction,” said one, while another added, “WHO wears black to a wedding with her top buttons undone showing a racy bra? Narciccist attention seeking #MeghanMarkle she just can’t stop herself can she?”

Beaumont Etiquette founder and expert in all things proper, Myka Meier, tells PEOPLE that wardrobe malfunctions don’t qualify as breaking royal protocol — they’re simply accidents.

“Meghan did not break royal protocol when her bra showed, as accidents or wardrobe malfunctions are not considered going against dress code rules. Her bra showing was not believed to be deliberate, in which case she would have not been seen to be disrespectful by the palace,” Meier explains.

She added, “A blatant disregard of a rule which was set in order to show respect would when you would consider a break in royal protocol, which the Duchess of Sussex did not do.”

Marilyn Monroe and Kate Middleton
Marilyn Monroe and Kate Middleton

Royals aren’t immune to the occasional outfit rebellion, like when Kate Middleton had a Marilyn Monroe moment thanks to a strong gust of wind during a visit to Mahatma Gandhi’s house during her 2016 royal visit to India. Similarly, Kate’s yellow dress was caught in a gust on an airport tarmac during the couple’s first royal tour to Canada.

Some have reported that Queen Elizabeth puts weights in the hems of skirts to avoid any chance of an unflattering photo.

RELATED: See the Wildest Celebrity Wardrobe Malfunctions Ever!

Prince Harry and Meghan Markle
Prince Harry and Meghan Markle
Meghan Markle
Meghan Markle

RELATED: Every Photo You Need to See from Meghan Markle’s Perfect Birthday Outing with Prince Harry

Despite the awkward moment, Meghan was all smiles for her first birthday as an official royal after her own wedding in May.

Although the Duke and Duchess of Sussex arrived at the church separately, as Harry was with other close pals of the groom helping with arrangements and ushering duties, the pair were seen holding hands together at the ceremony, as Harry gazed approvingly at his wife.

While Harry tended to his duties, Meghan chatted with several women in attendance, including Celia McCorquodale, whose June wedding she previously attended with Harry.

Related Video: Meghan is Having Trouble With Some of the Royal Rules