chunk glitch

when we we're going through a jungle going to another chunk near the ocean, i could'nt do anything in it, but my girldfriend was with me & she was able to do things, & i was desapearing & coming back & my horse also desapeared, no where to be found after a good search, diddo to at lease a good dosen before this one, since i've started this realm! (July 14th 2018).