Game runs at delayed tick rate in Bedrock Preview 1.21.90.21 (slow mob movement, delayed fall damage)

Following the upgrade to Bedrock Preview 1.21.90.21, the game runs with a slower tick speed. Mobs also move slower than typical and responses such as falling damage come with a more than one-second delay upon landing. The game never freezes nor lags in the general sense—everything is simply in slow motion.

Steps to Reproduce

1. Launch Minecraft Bedrock Preview 1.21.90.21.

2. Play a singleplayer world (one that has been used in split-screen).

3. Watch mob movement or jump from a height to check fall damage

4. Observe delayed fall damage and slower mob speed.

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Anticipated Behavior

Game should operate at regular tick speed: mobs walk/move normally and instant damage from falling upon landing applies

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Actual Behavior

Mobs move at a slow pace and animations are also delayed. Fall damage is dealt about a second later than landing. Everything in-game feels slower in general, as if the game's tick speed has been decreased.

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Supplementary Information

• The same problem exists in all worlds.

• No visual frame drops occur, only delayed simulation.

• There is no installed external content (mods, shaders).

• Split-screen was utilized 5 days ago on the same device and world