"/spawnpoint" command fails directly on Pressure Plates, Cobwebs, Signs, Open Fence Gates

For a simple pressure-plate & command block setup, when /spawnpoint @p (without coordinates) is operated by a command block, the command will fail after setting. /kill or dying says that the the home bed is obstructed, and returns the player to the original spawnpoint. This makes pressure plates and tripwires unreliable for setting a new spawn.

When the coordinate is set, it is within a block- namely the pressure plate or tripwire string. This is probably why the spawnpoint command fails. If the player's hitbox brushes the edge of the pressure plate or string, there's a higher chance setting spawnpoint will work.

To reproduce- place a pressure plate above the command block. Jump or land directly on the pressure plate. Type "/kill".

Nov. 1st: I tested this today. Still get the same issue landing directly on a pressure plate. This is not fixed.