Nostalrius Begins - Quality wow vanilla realm (1.12)

Every time I tame a pet it stays with me for awhile but when i log out or after so long it just vanishes. Every time the pet is at full happiness. He can not be brought back with Call Pet. I also tried putting the pet in the sables for awhile but when I tried to get him back to me it vanished. Please help fix this as soon as possible so i can continue playing.

The in game pet portrait is not tracking the pet happiness correctly.

It always show green, even when you tame them, which should be red.