drastic drop in 'Render Distance'-setting

Hi,

after updating to Minecraft 1.2.13, the render distance (the bar in the graphics-settings) is now limited to a maximum of only 16 chunks!
Before that, it was always 56 chunks (I played at 40 chunks, still quite smooth).
There was no change in hardware, I always used the same tablet (Fujitsu Stylistic Q665, 8gb ram, Core-M 5y71), so it MUST be an issue of the 1.2.13-update...