Even though Beyonce and Jay Z seemed to have moved on from the elevator situation in which Solange Knowles attacked the "Holy Grail" rapper at a Met Gala after-party, it looks like Blue Ivy's aunt is still holding on to some animosity.

The "Partition" singer's little sister deleted her older sibling from her life on Twitter and Instagram.

The reason as to why Knowles lashed out against Jay Z in that Standard Hotel elevator on May 5th still remains unknown however, it is clear that the past events are still festering with her.

Her anger seems to be so powerful that it has driven a wedge between the sisters. Following the release of the footage May 12th, the "Losing You" songstress removed her sister's photos from her social media accounts with the exception of one throwback picture on both her Twitter and Instagram.

Despite the shocking footage to fans, a source revealed that Beyonce, 32, and Jay Z, 44, are used to this type of behavior from the 27-year-old, according to Us Weekly.

The insider explained, "Solange has flipped her lid like that before," adding, "She is genuinely a sweet and nice person but she also keeps sh-- real. She can take a small thing and it triggers her."

Apparently Knowles even got into an argument with designer Rachel Roy and a few others earlier that evening during the after party at the Boom Boom Room. In fact, Solange was so out of control Beyonce "got in the middle of it."

Reflecting back on the elevator attack the source said, "This is not the first time this has happened," adding, "That's why Bey and Jay were so calm. They are used to this from Solange. It has definitely happened before."

Throughout the argument and attack Beyonce kept her cool as her sister and husband were at each other's throats.

An insider explained, "It is a testament to Beyonce's calm nature how she kept back and played the peacekeeper here," adding, "She is so calm and always the peacekeeper."

An onlooker revealed that Beyonce didn't seem too enjoy herself too much at the Met Gala after party. The observer said, "She wasn't smiling, was hardly with Jay, she was off with Solange the whole time."

What do you think happened that made Solange Knowles attack Jay Z? Let us know your theories in the comment section below.