Pistons retract upon logging into realm

Realm is on Win 10 version 1.1.2, bug happens when player not owning realm logs in on an iOS ipad air MC:PE 1.1.2. When I log on pistons are fine perodically when they log in all pistons reset. I have lost 7 or 8 villiagers when the piston retracts. As this periodic I do not have the abilty to recreate bug or video it.