Bug if a function is use in a repeating an use the /execute @e command

I write a function for the pre1 that spawns a tnt block if a arrow hits the ground.
And use the function i a command block.
Int pre1 it works nice and all was good.

Now in pre2 it spawns the tnt block at the command block which has the function inside
I hope this is not correct.

To Reproduce
just try a function which us the execute command with @e and run it with a commandblock

Test: !!!!!!!!!!!!!
Place a Armor Stand and use this command
/execute @e[type=armor_stand] ~ ~ ~ /summon cow

the cow spawns at you not were the armor stand is

I hope its get fixed