skeleton spawner crashes game -2

We are frozen out of a two player game. Host on pc win10, guest on android (galaxy s7) Whenever hosted player is invited player spawns to location they were when game first crashed, crashing game. Whenever host player approaches chunk containing skeleton spawner without inviting guest player, game crashes probably at chunk edge, or thereabout.
skeleton spawner is rigged with water sink to an xp item "farm" where players can sit outside of a slab opening and sword down skeleys while items flow into a chest/hopper rig. ,, Previously I crashed a singleplayer game around a skeley spawner contraption with similiar effects. breaking some blocks or opening certain chests would trigger the crash repeatedly, however previously in single-player I was able to do something different than any move I needed to do, for example walk around and break blocks that were irrelevant to my contraption,,, until I had neutralized the crash bug and could rebuild,, however this time the area is unable to be entered by walking or invite.