I put a command block with the command '/gamemode 3 @p' always active. I am in solo mode creative.
My problem is that whenever I enter the command '/gamemode 1', the block change the mode immediatly back to spectator.
As in spectator mode, I cannot destroy the command block, I am stuck.
If you have access to commands then you can easily destroy the block yourself. Aim for the block (use the look at option in the debug screen) then use: /setblock, press tab 3 times to add the current coordinates, then use 'air' as blocktype. The block will quickly go p00f.