There seems to be a bug that the text disappears just by playing normally.
(It also occurred with 1.2 patched.)
Just checked it out! It seems that this bug occurs randomly, which of course doesn't make it any less worse.
I will work on a new update and find what exactly is triggering this reaction. I expect to launch the update by the next days.
Thank you very much for your feedback and patience, Saka!!