PathfinderGoal bug?

Hey all,
So after lots of messing around with PathfinderGoals I discovered something weird.
I was making my own pathfindergoal so my zombie would follow my custom PathEntity and it turns out that when the validator function returns only true it will only execute the pathfindergoal once.
Only when you return false and then afterwards (when the pathfindergoal gets called a 2nd time) it will execute again.
for example:

Code:

true -> execute
true
true
false
true -> execute
false
true -> execute
true
true
false
true -> execute
(etc)

Is this a known issue? I managed to solve this with a very ugly solution:
Add a private boolean named "returnedTrue" and set it to true before every "return true;" statement, then at the top of the function add:

Code:java

if(returnedTrue) {
    returnedTrue = false;
    return false;
}

Now whenever it returns true twice it will execute always, however this doesnt seem right to me and I have no idea why this is happening.