Yes this has been in the game for a while now and seems to be do to client server lag. And since in 1.3 and it runs an internal server this bug was made a singleplayer bug as well.
This used to happen only when looking straight down or straight up, but I've now seen it looking at eye level too. Perhaps expanding the model of the 'cracking' block so it doesn't z-fight?
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
@unknown For me the breaking animation just disappears when I look exactly 90° down, it doesn't look like in your picture. Can you please make a video of it?
The game uses this bit of rendering magic to prevent z-fighting for the breaking animation:
GlStateManager.doPolygonOffset(-3.0F, -3.0F);
However, this seems to be ineffective at nearly perfectly straight-on viewing angles. I think this is due to the second parameter, the constant, being too low. I tested changing this to
GlStateManager.doPolygonOffset(-1.0F, -10.0F);
And was not able to reproduce this bug anymore, nor could I find any new issues caused by this change.
Using MCP names, this change was made in RenderGlobal.preRenderDamagedBlocks.
Sorry mate, you're too late for that joke, it's already fixed. And even if I do /execute at @e run summon ender_dragon and get a bug with it, it's still valid.
This was fixed in 1.13-pre6 (at least my suggested code adjustment was implemented by Grum) however it still seems to affect a very small amount of players. I have a feeling this is mostly players with Intel GPUs. The second example video posted by Kumasasa shows an Intel GPU in the debug screen.
So please, if you can reproduce this, give us the model of your GPU, or just post a screenshot with F3 open.
@unknown, the video you posted is irrelevant to the ticket posted here. Please create a new report about it. However, just like @unknown, I cannot see anything faulty in the video, so if you create a new ticket, please point out exactly what the buggy animation is.
Yes this has been in the game for a while now and seems to be do to client server lag. And since in 1.3 and it runs an internal server this bug was made a singleplayer bug as well.