Setting your Sneaking Speed attribute to 0 and then trying to move while sneaking will also set the game speed to 0 and require you to force-close the program.

Steps to Reproduce:

1. Set your Sneaking Speed attribute to zero:

   attribute @s minecraft:sneaking_speed base set 0
   

   Or, if you have Swift Sneak equipped:

   attribute @s minecraft:sneaking_speed modifier add mc:280134 -1 add_multiplied_total
   

2. While sneaking, attempt to move in any direction.