Wandering trader appears, but they are static, it is not possible to interact with them, there are no llamas and they never drink any potions / milk.

They stay at night and it seems for several game days, although I think new ones spawn each day: often around three will spawn in the same area if you're staying in one place.

It is possible to attack them and they will ascend rapidly.

It is possible to kill them if attacked fast enough.

My son and I are both seeing these glitches on the same Microsoft Realm.