Enchanted Tiki Dreams - S7-E23
Continuity mistake: Spongebob goes to set a canvas on the ground. On the spot where he is putting the canvas down, there are three flowers on the ground. In the next shot, after he set the canvas down, the flowers have disappeared.
Chosen answer: You need to provide a little bit more information to be able to answer a question like this. In what region is it not being shown? I see it being replayed here in Australia fairly frequently. As for a general reason, there does not appear to be any for why it specifically might have been taken off the air in any country or region. Like any show certain episodes can sometimes not be replayed for long periods for unknown reasons.
Lummie ★