timeout vs promise timeout in ev

console.log('---start---');

const timeOut = (val,wait)=>{
  setTimeout(()=>{
    console.log(val?val:"timeout");
  },(wait?wait:0));
}

const fPromise = (parm)=>{
    return new Promise((resolve,reject)=>{
        resolve(parm);
    });
}

fPromise('Ptime0')
  .then(val=>timeOut(val,0));

timeOut('time0',0);
timeOut('time1',1);
timeOut('time1.9',1.9);
timeOut('time2',2);

my excepted result

---start---
time0
Ptime0
time1 
time1.9
time2

· result in my browser is bellow, and the result seems steady, but few times Ptime0 will become the last one.
· 2 millisecond is like the margin time for my computer to transfer the timeout from Micro Task Queue (the promise in) to the Task Queue
· but why the task in task Queue executed before the transfer process is done!! how could it be if is performed by sequence, and how could it be parallel in a single thread with event loop.

---start---
time0
time1
time1.9
Ptime0
time2

• Learning Resources:
  https://jakearchibald.com/2015/tasks-microtasks-queues-and-schedules/
  https://www.youtube.com/watch?v=aUigiwN0NEw
  https://blog.risingstack.com/writing-a-javascript-framework-execution-timing-beyond-settimeout/
  https://html.spec.whatwg.org/multipage/webappapis.html#event-loops