I have samsung galaxy s i9000 and i can confirm that it happened to me when i was on jellybean 4.1, 4.2, 4.3 (custom roms). It was ok on ICS 4.0.4. The google fixed it when they released android 4.4 for phones with low ram. At jellybean i got system lag that i could just reset my phone (2 mins of gameplay on fancy graphics and far render dist.). Now i'm on UNOFFICIAL Cyanogenmod 11 (android 4.4) and i played with fancy graphics and long render distance for longer than 5 mins, i could build a platform on which i spawned a lot of chickens. There was a lot of minecraft lags, but system didn't lagged. I was able to quit the game through it menu.
I have samsung galaxy s i9000 and i can confirm that it happened to me when i was on jellybean 4.1, 4.2, 4.3 (custom roms). It was ok on ICS 4.0.4. The google fixed it when they released android 4.4 for phones with low ram. At jellybean i got system lag that i could just reset my phone (2 mins of gameplay on fancy graphics and far render dist.). Now i'm on UNOFFICIAL Cyanogenmod 11 (android 4.4) and i played with fancy graphics and long render distance for longer than 5 mins, i could build a platform on which i spawned a lot of chickens. There was a lot of minecraft lags, but system didn't lagged. I was able to quit the game through it menu.