The reason, according to the company, is that it hasn't heard from the committee in weeks about an imminent deadline for parent company ByteDance to sell off US assets over national security concerns.
CFIUS set the deadline of 12 November for TikTok to divest itself of "any tangible or intangible assets or property, wherever located, used to enable or support ByteDance's operation of the Tik Tok application in the United States".
TikTok says it applied for a 30-day extension that was allowed for in the CFIUS' order, but hasn't received any communication on the matter. It's not clear what would actually happen if the deadline passed.
TikTok was granted a preliminary injunction against it late last month.
Trump wanted TikTok shut down after its users embarrassed him by stuffing up one of his rallies for security reasons.