Ah I have fixed it. Idk fully how or why but when I moved the script from a common event to a random one just to test it started working again. Sorry for wasting your time.
Viewing post in [SOLVED] Can not drag text
Sorry to re-open this but I seem to be having a similar issue with text appearing/dragging so this might be a bug? The same fix even worked for me (moving the script from a common event to a world event made the text appear). The thing is: I DEFINITELY need to have the text editable in a common event (I'm trying to do basically make a custom inventory).
Let me know what information I can provide to you to help :D