Shield freaking out+accidental duplication

+underlined text+So while playing with my friends and one who owned the world plays windows
10. As soon as I got a shield it started randomly spamming from deployed to undeployed when I was crouched. This seems to have happened the most commonly when I was fishing. But it still happened randomly whenever I crouched. So at a certain point I decided to take my shield off because it needed to be replaced, then it started spamming out between the deployed and undeployed positions and I took it out of he offhand, result? I had a duplicate. Not sure if it was because of the cross platform or whatnot but that could be a problem for possible future offhand usable items.