Minecraft (PC) blocks disappear immediately after placement?

I have the problem in Minecraft (creative mode) that I can't place a block anywhere in the world. It is only rarely, but annoying anyway. If I put a block, then it is immediately gone within a few milliseconds and I can then place anything at this point, without it disappears immediately. What could that be?

That's a bug, which is why I have not found out, but short out and back into the game fixes the problem, then the block is there.

If you dismantle blocks with less than 50ms interval, the game can't register all. This causes one of the two blocks mined in the 50ms not to be displayed, but still there. If you then try to place a new block at this point, the game registers that there's already a block there and makes the placement fallback. That means: do not use fastbreak hack / plugin (or efficiency V) and everything is fine.