The loot tables for a world appear to reset upon reopening the world.

I noticed this with fishing - near the beginning of my loot table there was an enchanted bow, and an enchanted fishing rod.

After reloading the world a few hours later, I went fishing again... and got the same bow; thinking to myself "what are the chances it has the same enchantments and durability?" And shortly after received the same enchanted fishing rod - same enchantments, same durability.

I've created a new world. Checked the weather: raining or not doesn't appear to affect the results. Closed the world and restarted the launcher. Closed the world and reopened without restarting the launcher. Checked with mobs, and fishing, and the loot table command. All appear to be reset upon reloading the world.

steps to reproduce:

1. Load a world
2. Interact with the loot tables.
3. Close the world.
4. Reload the world.
5. Interact with the loot tables in the same way; note the same results.

e.g., super flat cold ocean; seed: 18768051455537978451

Fishing with a non-enchanted fishing rod returns: raw cod, raw cod, bowl, raw salmon, water bottle, raw cod...

Killing 3x witch with a non-enchanted weapon returns:

1. Empty bottle, stick x2, red stone dust
2. stick, glow stone dust
3. gunpowder x2

and directly interacting with loot tables; such as via the loot command:

/loot give @p loot Minecraft:gameplay/piglin_bartering

1. Obsidian
2. fire charge
3. spectral arrow x8

The splash screen "Something's not quite right..." was strangely appropriately timed.