Sprite shows in Scene but disappears when zooming out

You are using the mousewheel to “zoom”? If so, you get the same effect in 3D. This is an age-old problem because this sort of “zoom” also affects camera rendering and at some point objects get culled because they are outside of the camera’s view frustum. In that sense it’s not really a “zoom” the way we expect it to ie without ever affecting object rendering.

I rarely use that zoom or at most just a few clicks of the wheel and I make sure to reset it right thereafter. Select an object and press ‘F’ to restore the original zoom level.