Some Strongholds may stop generation prematurely.

Stronghold generates identically in current version as it had in a different world in version 1.20.61.

Occurs on both Realms and local single-player worlds.

One particular instance is located near coordinates 2850, -20, 1200 on Bedrock seed 642239681 (Hi hi hi).

A second instance has been located near coordinates 7750, 25, -1130, on the same seed. The current rate that is is occurring is 2/5 discovered Strongholds, possibly affecting half of the world's Strongholds. 

Eyes of Ender lead to the stronghold, and so does the locate command.

Pne of the strongholds generated with only two paths in the entrance room, one functioning normally ending in a dead end, the other wrapping around and intersecting with the enterance room, causing the hallway height to decrease from 3 blocks to 1 block. No further Stronghold was generated in this instance.

Images taken in an identical seed created on the same version as the actual world, done in spectator mode for better clarity.