What I did:
I wrote a text in Korean and copy & pasted a sentence.
Text disappeared when I hit enter key after pasting(command + v) a sentence.
I found that word randomly disappears when I hit enter or delete key.
Things that might be helpful to know (Agenda version, OS and model, etc):
iPad 12.9 1st gen - iOS 12.1.4
I have a video but I can’t upload because I am a new user.