Robert Pattinson and FKA Twigs are still popular subjects in headlines, especially that the couple has not officially exchanged their vows. Now, reports have it that the two may be having a relationship trouble involving Pattinson's ex, Kristen Stewart.

LifeandStyleMag, citing OK! Magazine, reported that the "Twilight" actor was secretly talking to Stewart on the phone without Twigs' knowledge, and this, of course, made her seriously upset.

A source revealed Twigs found out that the former lovers were having a phone conversation because she discovered Stewart's name included on Pattinson's list of recent calls. The 27-year-old Twigs allegedly confronted her beau, who explained that he only called to congratulate his ex for being nominated for an Oscar award.

The source continued to report that the music artist wasn't happy with what she found out and thought that Pattinson's excuse wasn't good enough.

Media just can't let go of the popular couple, as evidenced by the never-ending rumors that they face. For instance, Celeb Dirty Laundry claimed that Pattinson is "urged" to ditch his wedding to get back with his ex-girlfriend and "Twilight" co-star.

The publication also alleged that the actor misses his old life with Stewart and added that fans of the "Twilight" tandem are hoping that they reunite.

But this rumor has been debunked by Gossip Cop, explaining that Celeb Dirty Laundry's report is simply false and not based on facts.

Previously, there were also rumors suggesting that Pattinson's family prefers him to go for Stewart than Twigs, which is one of the reasons why people never saw the couple's wedding happening.

Amidst the rumors, Pattinson and Twigs have remained silent about any issues that came their way. Neither has addressed breakup rumors that have been circulating in the previous months.

There's still no official news about their wedding, but friends of the couple reportedly said that the wedding bells will soon be ringing.