We are having this problem as well. Three of us play PE on different devices over LAN where the worlds are located on my son's device and have had this happen. We play multiple worlds, but there is one world that definitely has this glitch more than others. I've started requesting we don't play that world anymore because I can't keep a sword through the whole play time.
I have not noticed it happening in relation to funaces, but I thought it might be more frequent after I had been in a chest (within a minute or so). However it happened one time while I was cave exploring and had not come into contact with a chest, furnace, mob, or had any armor break, so that's not absolute. It does also seem to be more frequently the things in the first hotbar, but again, not always. Today I had moved several golden carrots into and then back out of a chest, they were not in my hotbar but I decided to stop by our horse pen and feed them but they had all disappeared. I also lost two iron swords (I stopped making diamond swords because I'm sick of loosing them). One was within two minutes of crafting it and without using it at all. We played 20 minutes and then I called it quits after loosing so much stuff. It is better on other worlds, also from the same devices, but it still happens.
Sara l
We are having this problem as well. Three of us play PE on different devices over LAN where the worlds are located on my son's device and have had this happen. We play multiple worlds, but there is one world that definitely has this glitch more than others. I've started requesting we don't play that world anymore because I can't keep a sword through the whole play time.
I have not noticed it happening in relation to funaces, but I thought it might be more frequent after I had been in a chest (within a minute or so). However it happened one time while I was cave exploring and had not come into contact with a chest, furnace, mob, or had any armor break, so that's not absolute. It does also seem to be more frequently the things in the first hotbar, but again, not always. Today I had moved several golden carrots into and then back out of a chest, they were not in my hotbar but I decided to stop by our horse pen and feed them but they had all disappeared. I also lost two iron swords (I stopped making diamond swords because I'm sick of loosing them). One was within two minutes of crafting it and without using it at all. We played 20 minutes and then I called it quits after loosing so much stuff. It is better on other worlds, also from the same devices, but it still happens.