Hi, I just notice that when some player is lending pokemons they complain because when pokemon is returned some of the moves are changed, I think it is better to prevent other players to change the moveset of a certain pokemon if it is only lended

When a Pokémon returns to lender everything on the pokemon is reset to the state the Pokémon was in when 1st lended.

 

Moves can be changed on a lended pokemon, but they don't effect the lender in anyway. Suggest you note to the 'player' that they double check what moves they lended the Pokémon out with and take screenshots if they have discovered a bug.