Device:
Nvidia K1 tab.
Running Android 6.0.2 with root, but stock otherwise.
Whenever a seed is entered that contains a stronghold(I think that it's only when the stronghold is within the spawn generation), the progress bar for the world generation gets about 1/4 of the way and then MCPE will hang and crash clean to the launcher.
From here, it's version dependent
On 15.90.0, if you try to load the world with the stronghold, it will crash to the launcher again. Also, the world is marked as being 0.00 MB.
On 15.90.2, the world is loadable. However, only the stairs(The starting position of the stronghold, I guess?) of the stronghold were generated. The game will also crash when you select to quit to menu.

I could try to get a recording of the whole process if you would want it.