No I haven't by my self but something happend with the current theme during update...... changed it for another and now all B4A text is back. I now realise that people that say "don't change things that are not broken" are right ;-)
Strange that I haven't seen this behaviour in other applications as I work with quite a few and the application I made in VB.NET I don't see this issue even if I'm using "tooltips"