Note: I am bad grammar for english, because im deaf, please read.
Bugs:
I try to write the command block...
I want to make "@s", like a self (private player), i dont want @p!
If you write /effect @s levitation 3 3 you dont have the effect nothing! Please fix that.
I have recording and watch here, please.
Click here in my video: https://youtu.be/p5_fCTBY2PY
@s doesn’t work in command blocks, because the command block is not an entity. This is not a bug.