Updated steps to reproduce

(Distilled from this comment and comments following it.)

1. Find a Witch Hut
2. Set up a system to automatically kill witches that respawn at the hut.
3. AFK far enough away for witches to respawn.

Expected result

Witches continue to respawn indefinitely.

Actual result

Witches eventually stop respawning.

Expected Results: Witch Huts would consistently respawn witches. Witches should respawn in huts consistently enough to make the area challenging and/or to make witch farms feasible.

Observed Results: Witch Huts have the ability to respawn witches, but they do not do so consistently. Very often, after killing the witch that spawns with the structure, no more witches spawn. Further, creating a witch farm from the hut can take an enormous amount of time and effort, such that players get frustrated and abandon the attempt, or do not even try to begin with.

Steps to Reproduce:

1. Find a Witch Hut
2. Kill the witch that spawns with structure generation.
3. Stay near the hut for a while. You will likely see very few witch respawns from the hut. Often, some will respawn at first, but then they will stop respawning.

 Note:
This is a bug report, not a feature request. It is a bug that witches do not respawn consistently in Witch Huts because the developers’ intent is that they should. I believe respawning witches is the developers intent because there is an old history of bug reports stating that witches were not respawning (MCPE-23920, MCPE-24629, MCPE-27818, MCPE-27820, MCPE-29564, MCPE-29779) which led to a change in mechanics implemented in 1.2.13. The changelog for 1.2.13 states “Fixed witches not spawning inside Witch Huts.” However, the issue has never really been fixed. The fix to MCPE-21856 in 1.16 made respawning witches more consistent and made farms vastly easier to set up, but players still struggle with the obscure spawning mechanics and the monster cap filling over time due to MCPE-125111.