Weird to criticise a player over something like these. From what I have read so far, he is the type to always strive to improve his game, evident in last season's performance after the world cup. He changed his attitude as well for both off and on the pitch.
This season, it doesn't quite work well for him (yet, I hope) but we haven't heard anything that resembles bad attitude from him, off pitch wise. Yes, I know his performance doesn't quite match up to par yet, and lacking the discipline to work defensively but he is getting there.
I just find it weird people find time to criticise him over such petty matters, whereas player like Mane who is lauded here, supposedly already letting his current team and previous team by missing/late to team meetings/trainings, which should be the bigger thing to concern over, attitude-wise.