WP34S on iOS (iPhone) clears display when put down

[burkhard]

In addition to the physical calculator, I have the iOS version ("VERS"under menu X.FCN returns 34S 3.3T 3898) on my iPod Touch Gen 6. I use it quite often and have never seen the problem you are describing. I just tried it a bunch of times and the result remains unbothered each time.

Is it only after a specific type of calculation? Are other calculations always OK? If you find a calculation that has the unwanted behavior, is it repeatedable each time you try it?

Sounds like an odd one!