When I try to play in creative I'm half in spectator and half in creative. It means that I have the creative menu, the hotbar and I can interact with chest but I'm passing through blocks when flying like in spectator mode and I'm not able to pick up dropped items.
I have to deal with this problem since I used carpet command (it was the player command I believe)
The spectator and survival gamemodes work totally fine, the only issue is in creative.
Is there a way to fix it keeping the mode ?? (because everything come back normal when I play without carpet mod)

That's not a bug, it's that you have the creativeNoClip rule enabled (you can disable it by doing /carpet creativeNoClip false).

Ok thanks for the help. Works out great.