Cloning Redstone-Torches

When a redstone torch is cloned with the "/clone" command and if there is a transparent block above that torch (and part of the cloned area) the transparent block in the destination will send a very short redstone pulse (less than 1 tick, but can trigger cmd-blocks/repeaters/... but not pistons).

If the recieving redstone to check the signal is inside of the copied area as well, the signal will only go into negative X and Z directions and won't trigger in the positive ones. (Which is very weird...)

Everything was in the same chunk when testing it, so chunk borders were definitly not a problem.

Steps to reproduce:

• Enter a world and build one cross like structure like shown in the screenshot

• Clone that whole structure to somewhere else
  > You will see, that the redstone stays off but the repeaters in negative X and Z directions will turn on in the destination of the clone

• Now only clone the redstone torch and the airblock above it
  > Now all repeaters will trigger

The intended behaviour would obviously be, that no redstone would turn on, since redstone torches only give power to the redstone above if there would be a solid block.

Edit: The direction of the redstone torch (which side it is attached to/standing on the ground) doesn't matter, it's always the same as said above.

Edit2: Same thing as with the redstone torches upwards goes for normal repeates as well. If they point into a transparent block that block will get that less-than-one-tick pulse as well. Comparators don't though.