According to a Telegram post from CEO and founder Pavel Durov, an upcoming Telegram major update has been trapped in Apple‘s app review for two weeks “without explanation” (via MacRumors). Although it hasn’t been approved, he says that the update is “about to revolutionize how people express themselves in messaging.”

The unexplained holdup was discussed by Durov as part of a larger analysis of app store business strategies. He claims that the “obscure” app approval procedure “imposed on all mobile apps by the tech monopolies” is hurting Telegram. “If Telegram, one of the top 10 most downloaded apps worldwide, is being treated this way, one can only imagine the challenges faced by smaller app developers,” he added.

The latest update’s actual details are unavailable, and requests for comment from Apple and Telegram were not immediately answered. Durov has previously criticized Apple for its app review procedures. After Russia banned Telegram, Durov claimed that Apple had been preventing updates to the iOS app for Telegram. Apple approved an update a day after Durov tweeted about the problem.

Recently, Telegram launched its $4.99 per month Premium service called “Telegram Premium,” which offers users access to extra features like voice-to-text functionality, faster downloads, larger uploads, and more.