Ghost plane

I had this plane on my Skyview for a few seconds than it disappeared. I have looked on ADSBExchange and… there it was!
I guess it’s hiding from me? Then it re-appeared… I guess there are trees in that direction?

Italian military tanker: en.wikipedia.org/wiki/Boeing_KC-767

Note that it is much lower than other aircraft at around the same range - it may be right on the edge of your radio horizon.