I have hesitated to report this because I cannot reliably cause it to happen and it happens infrequently. Two people, including me, have experienced text that disappears upon exiting a Text Edit Object. Once in a while, I have typed text into a field, pressed tab, and the text disappears, and won’t come back with command Z.
I am going to try to figure out the exact sequence that can cause this. Very annoying. The other person reported that it happed three times in a row. I wonder if anyone else has experienced this.