Strongholds Does not Generate Correctly

Good morning,

Recently I found a nice seed(502186357) with a temple at 1K blocks from the spawn ... but with the command "/locate Stronghold" , I found a village( In -2244 y? 2472) with Stronghold, but it don't Generate a End Portal room or silverfish spawner.

The others rooms Generate Correctly ,

I have tested in all beta (1,2,3,4,5,6,7 and 8) (first 5 stronghold , "-2244 y? 2472" "7760 y? 8528" "-8592 y? -7312".... ) i have same issue.

seed: 502186357

and i have tested in beta 8 with they seed 1421295622(fourth screenshot) and 13562365251(fifth screenshot) i have same issue

Sorry for my bad english, Benoit,