壁掛けから目を離すと、0.5ブロック分壁掛けが下がります。

Loading dimension 0 (world) (net.minecraft.server.dedicated.DedicatedServer@5651f4af)
[23:36:44] [Server thread/INFO]: Loading dimension -19 (DIM-19) (net.minecraft.server.dedicated.DedicatedServer@5651f4af)
[23:36:44] [Server thread/INFO]: Adding world access to world net.minecraft.world.WorldServerMulti@63d837b7
[23:36:44] [Server thread/INFO]: Loading dimension -42 (DIM-42) (net.minecraft.server.dedicated.DedicatedServer@5651f4af)
[23:36:44] [Server thread/INFO]: Adding world access to world net.minecraft.world.WorldServerMulti@6edfa606
[23:36:44] [Server thread/INFO]: Loading dimension 1 (DIM1) (net.minecraft.server.dedicated.DedicatedServer@5651f4af)
[23:36:44] [Server thread/INFO]: Adding world access to world net.minecraft.world.WorldServerMulti@4c175917
[23:36:44] [Server thread/INFO]: Loading dimension -1 (DIM-1) (net.minecraft.server.dedicated.DedicatedServer@5651f4af)
[23:36:44] [Server thread/INFO]: Adding world access to world net.minecraft.world.WorldServerMulti@6f26e5d3
[23:36:44] [Server thread/INFO]: Adding world access to world net.minecraft.world.WorldServer@23facc3d
[23:36:44] [Server thread/INFO]: Preparing start region for level 0
[23:36:46] [Server thread/INFO]: Preparing spawn area: 50%
[23:36:46] [Server thread/WARN]: Wrong location for EntityStormSwords['entity.flammpfeil.slashblade.StormSwords.name'/3, l='world', x=NaN, y=NaN, z=NaN] in world 'world'!
[23:36:46] [Server thread/WARN]: Entity is at NaN,NaN (chunk 0,0) but was stored in chunk 22,-38
[23:36:46] [Server thread/WARN]: Cauldron has removed EntityStormSwords['entity.flammpfeil.slashblade.StormSwords.name'/3, l='world', x=NaN, y=NaN, z=NaN] to prevent a server crash.
[23:36:46] [Server thread/WARN]: Wrong location for EntityPhantomSwordBase['entity.flammpfeil.slashblade.PhantomSwordBase.name'/4, l='world', x=NaN, y=NaN, z=NaN] in world 'world'!
[23:36:46] [Server thread/WARN]: Entity is at NaN,NaN (chunk 0,0) but was stored in chunk 22,-38
[23:36:46] [Server thread/WARN]: Cauldron has removed EntityPhantomSwordBase['entity.flammpfeil.slashblade.PhantomSwordBase.name'/4, l='world', x=NaN, y=NaN, z=NaN] to prevent a server crash.
[23:36:46] [Server thread/WARN]: Wrong location for EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/5, l='world', x=NaN, y=NaN, z=NaN] in world 'world'!
[23:36:46] [Server thread/WARN]: Entity is at NaN,NaN (chunk 0,0) but was stored in chunk 22,-38
[23:36:46] [Server thread/WARN]: Cauldron has removed EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/5, l='world', x=NaN, y=NaN, z=NaN] to prevent a server crash.
[23:36:46] [Server thread/WARN]: Wrong location for EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/6, l='world', x=NaN, y=NaN, z=NaN] in world 'world'!
[23:36:46] [Server thread/WARN]: Entity is at NaN,NaN (chunk 0,0) but was stored in chunk 22,-38
[23:36:46] [Server thread/WARN]: Cauldron has removed EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/6, l='world', x=NaN, y=NaN, z=NaN] to prevent a server crash.
[23:36:46] [Server thread/WARN]: Wrong location for EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/7, l='world', x=NaN, y=NaN, z=NaN] in world 'world'!
[23:36:46] [Server thread/WARN]: Entity is at NaN,NaN (chunk 0,0) but was stored in chunk 22,-38
[23:36:46] [Server thread/WARN]: Cauldron has removed EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/7, l='world', x=NaN, y=NaN, z=NaN] to prevent a server crash.
[23:36:46] [Server thread/WARN]: Wrong location for EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/8, l='world', x=NaN, y=NaN, z=NaN] in world 'world'!
[23:36:46] [Server thread/WARN]: Entity is at NaN,NaN (chunk 0,0) but was stored in chunk 22,-38
[23:36:46] [Server thread/WARN]: Cauldron has removed EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/8, l='world', x=NaN, y=NaN, z=NaN] to prevent a server crash.
[23:36:46] [Server thread/WARN]: Wrong location for EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/9, l='world', x=-Infinity, y=-Infinity, z=-Infinity] in world 'world'!
[23:36:46] [Server thread/WARN]: Entity is at -Infinity,-Infinity (chunk 2147483647,2147483647) but was stored in chunk 22,-38
[23:36:46] [Server thread/WARN]: Cauldron has removed EntitySpiralSwords['entity.flammpfeil.slashblade.SpiralSwords.name'/9, l='world', x=-Infinity, y=-Infinity, z=-Infinity] to prevent a server crash.