I've come to find that 1PSW4 always asks me for my password when I switch to another app and then switch back. It does that despite the fact that I have Auto Lock turned off. (I also have the Quick Unlock Code turned off too.) This is very troubling to me because I decided in the last few days to increase the security of my master password from 9 digits long to 19 digits long.
Previously when I was using 1PSW3 on my iPad3, 1PSW3 would ask me every now and then for my password, even with Auto Lock set to Off. But the big difference between 1PSW3 and 1PSW4 is that 1PSW4 asks me for it every single time I switch to an app and then switch back to 1PSW. 1PSW3 never started doing that until I launched another 7 or 8 apps, which I assume caused iOS to put 1PSW3 into standby. but again, that's not the case with 1PSW4.
I know for a fact that this problematic 1PSW4 behavior is NOT a RAM related problem. You see, even if I only have Mail, Safari, and 1PSW4 open, 1PSW4 will still ask me for my password when I switch to Mail or Safari (even for a split second) and the switch back to 1PSW. Furthermore, I have an app called "System Status" which reports very accurately to me how much memory is being used and how much memory is free. That app informs me that 28% of my RAM is free, which translates into 279 MB free.
I even tried killing the 1PSW4 app and relaunching it, but that didn't solve anything. So after much testing, it appears that this is a bug in 1PSW4 that prevents the "Auto Lock = Off" setting from being recognized. Your kind assistance in addressing this bug would be greatly appreciated.