Mobs spawning in one chunk during the day
Upon creating a super flat desert world, a bunch of mobs were grouped up and were constantly spawning in one certain chunk. After going far enough away for them to despawn, the chunk no longer spawned any mobs.
Created Issue:
Mobs spawning in one chunk during the day
Upon creating a super flat desert world, a bunch of mobs were grouped up and were constantly spawning in one certain chunk. After going far enough away for them to despawn, the chunk no longer spawned any mobs.

Could that be caused by
MC-315?Did you create the world with a previously used world name ?
More likely caused by
MC-80966– this is the only empty chunk visible in the screenshot (all other chunks contain blocks, such as cacti and dead bushes).