Yes, they have to...That's what players/coaches do all time in this league.
When media asked Harden/McHale about some issues between them, they denied it while both worked together on the same team..A few months later McHale got fired and he finally admitted the problems.
I also doubt they asked Manu a very specific question about Kawhi's personality.
Again, if they were gonna have a meeting, they shouldn't have talked to the media. Just let those things in the locker room like other franchises have done while the player is still on the roster.