What's your call - player entering without being beckoned?

[dkmz17]

Similar question - An Official is about to provide the ball to A1 for a throw in or for a free throw that, if missed will become a live ball, and he or she sees a player on the sideline for Team A or B get up, and while talking to the coach start to edge towards the table to report. Should the official hold the ball until the player reports and then allow the player to enter the game or should the official ignore what is going on at the bench? I see this quite a lot, and have even had officials provide the ball to the player for a throw in and then grab it back when they see a player heading to the table.