Does anyone have this issue?

end of the day comes, the doorbell rings, happy children run to the door to greet mommy or daddy. They hug and kiss and excitedly talk about something awesome that happened that day and say that they missed their parents. . . . then as soon as they start getting ready to leave, the tears begin, the arguing begins, babies start to scream and cry and carry on. WTF?

This is not all the children. Only one (every time) and another (once in a while). Last night I saw this with a temporary ward I had for a few days after her daycare provider hurt herself.

It makes me feel terrible for the parents who had a long day at work and just want to come pick up a HAPPY child and go home. I've called out the kids when they are doing this saying 'that's enough of that. Mommy was so excited to see you and hear all about your day. It's not fair that you see her and give her such a hard time after such a great day. Lets keep this great day going. So that's enough.' Sometimes it curbs the worst of it but sometimes it doesn't.

Anyone else get this?

To clear up the details
1) had a great day no tears
2) had a solid nap
3) had a solid lunch
4) no issues that could cause a child to snap or break down

Transitioning can be hard for children whether its between activities or getting ready to go home. These children get the warnings 10 min to mom, 5 minutes to mom, mom is on her way, mom is here! these children have no trouble transitioning between activities either (warning or not).

I just want mom to get a happy kid to take home instead of a miserable one who might completely unravel.