[Functions] Anything commands executed relative to anything doesn't doesn't run the command

Any command in a function that is using relative cords, will not run the command but will say it executed in the chat, even though it didn't actually happen.

Ignore this example, strike through won't work-Example:
This command works
/execute @a 0 100 0 detect 0 99 0 stone * say words

however, this command does not.
/execute @a ~ ~ ~ detect ~ ~ ~ stone * say words-

I have found some more information. execute [selector] ~ ~ ~ does in fact work, but relative coords inside other commands don't work.

Example:
"execute @a ~ ~ ~ /particle angryVillager 100 100 100 0 0 0 0.1 50" will work

"/particle angryVillager 100 100 100 0 0 0 0.1 50" also works

However "execute @a ~ ~ ~ /particle angryVillager ~ ~ ~ 0 0 0 0.1 50" will not work