Son peeing outside

Hi ladies,

So my son is 3 years old and like all little kids he gets wrapped up in what he’s doing and forgets to go to the bathroom. So my husband taught him how to pee on a tree outside. He gets to use the bathroom and doesn’t get pulled too far away from playing when outside. Well he did this the other day at daycare and I guess he was scolded and put in timeout but we don’t see the big deal. He went away from his friends, did it in private behind a tree and continued playing. We haven’t brought him back since. Should we apologize? Or should we keep looking for another daycare?