It feels like my sleeve caught on the wall or something - there's a jerky movement as if he's trying to move forward, but is caught on something. I have to back up or move sideways before I can continue. I can't reproduce it on purpose, so didn't report it before, but it's been happening through several updates now.
I've been unable to move forward or jump, and it's occasionally happened while moving sideways as well.
Happens a couple times a day, when I play for a couple hours at a time.
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Can you please press F3 + C while in-game to force a crash and attach the resulting crash report here ?
Possibly you run into the invisible block issue ?
Can you leave and reenter the game when this issue happenes next ? If there's a block where no block was prior leaving, then it's the invisible block phenomenon.
I was going to report a similar issue that I can reproduce easily. The player gets stuck in corners of chests when walking towards the sides of chests at an angle. Most of the time the player gets stuck and this jerky movement occurs. I didn't know that it occurs when colliding with other objects too.
Anvils: MC-1669
It's occurred when moving down hallways or even exploring outdoors, where I have not placed any blocks. I'm exploring now to try to reproduce it for that crash report thing, but I think I've gone out and come in again to still be stuck, so it doesn't seem like the invisible block thing. Once I backed up, placed a block where I'd been getting stuck, dug it out, and could walk through the spot without trouble, but that spot was a consistent problem, where other times it hasn't been.
I think this ticket got superseded by MC-68080
Is this still an issue in the current Minecraft Snapshot 15w47c or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
I've seen this happen in current versions (I'm not sure of specific ones, though). It's easiest to reproduce if you're instant-mining with Haste 2 and Efficiency 5 (or, Efficiency 3 in the nether).
I think there's a pretty easy way to fix that, and that is to resend the block the player is trying to move into (a Set Block packet) whenever a player tries to move through a solid block. That would fix the desync that is probably happening.
I believe this bug happens because the client thinks it broke a block, but the server ignored or rejected the block breaking. The client then thinks that the block is air, but the server thinks it's a solid block, so when the client tries to move through it the movement is rejected. You can see that this is a desync because trying to interact with that air block causes it to become a solid block (either by right-clicking it or by placing a block "in" it).
Actually duplicate of MC-5694
Only happens to me when I walk into a non-solid block, like an anvil or a fence.