In my inventory I had 10 bee nests. In an attempt to store them, I opened a shulker box and tried to put them in. Instead, when I clicked on it, I could not move it from that current inventory slot. If I had one in my hot bar and pressed 'Q', it would put  it straight back in my inventory almost instantly. This goes for placing them as well, the same thing happens. I tried dying to see if that fixed anything, but that did nothing. I am playing on a realm and I have normal perms if that helps.