Can’t send my one friends TikTok’s but I can still message her.

two days ago I went to send my friend a TikTok and her little icon was gone from the line up. which is strange because she’s literally the only person I ever send anything to. all the others are group chats she’s added me to that include her and someone else. but not her directly for some reason, and when I try and search her up in the search icon in the share tab, she doesn’t come up, but I’m still able to send her messages through the inbox and access our chats and she can send me videos. it hasn’t resolved itself and I went through my settings and nothing is turned off so I don’t know why it’s only her specifically.