I’ve done it twice . . . I hit tab to get to post and the cursor lands in my tagline . . . for whatever reason it is erased. Luckily I caught it both times and basically canx’d the post and repeated the process being more careful.
Yes. I did not remember how I did it, but it happened with me too. Operator error.
At first I did not understand what the question asked was. But then the light finally came on.
Simple enough to fix.