Display Flashes when Program Terminates – HP 15C Calculator Review

I’ve owned HP programmable calculators since 1981. I’m unable to get even the simplest program without having the display flashing when the program terminates. The program I’m using is: 000 f LBL A 001 R/S I run the program using the following two keystroke sequences: GTO A R/S and GSB A In both cases, the display flashes when the program terminates. Every program I enter does the same. I’m running the app on an iPhone SE. I really like the program but this flaw is very annoying.
Review by dcutler on HP 15C Calculator.