Entities standing on slime blocks have their OnGround NBT tag constantly switching between 0 and 1

English is not my native language; please excuse typing errors.

The bug:

The Boolean values of "OnGround" will jump wildly between true and false, when I walk to the slime block from other bolcks.

How to reproduce:

Put the following command into the repeat command block and select "always archive"

/execute as @a run tellraw @s ["Now OnGround=",{"nbt":"OnGround","entity":"@s"}] 

Then walk on the slime block.

In addition, in this case, jumping or jumping to the slime block form other blocks will display normally(OnGround:1b).

But if I press the SHIFT{into Sneak}, the bug will reappear.

The previous version also exists, but it is not known from which version.