Thank you :)!
Hmm, off the top of my head, it might have something to do with what layer you're creating the textboxes in (if you're using GMS2) or what depth (if you're using GMS1). It may be that the textboxes are getting drawn "under" everything.
Otherwise I think I'd have to know more about your project/see it for myself and tinker with the code. Feel free to send me the project file/additional info at friendlycosmonaut@gmail.com, or hit me up on Discord if you'd prefer a chat (FriendlyCosmonaut#1735)!