下面的代码：

process.nextTick( () => console.log("nextTick 1") );
process.nextTick( () => { 
    console.log("nextTick 2"); 
    Promise.resolve("Resolved promise inside nextTick").then(console.log); 
})

Promise.resolve("Resolved promise 1").then(console.log);
Promise.reject("Rejected promise 2").catch(console.log);

setImmediate( () => {
    console.log("setImmediate");
    Promise.resolve("Resolved promise inside setImmediate").then(console.log);
    Promise.reject("Rejected promise inside setImmediate").catch(console.log);
    process.nextTick( () => console.log("nextTick 3") );
})

在节点v14.17.0中输出

Resolved promise 1
Rejected promise 2
nextTick 1
nextTick 2
Resolved promise inside nextTick    
setImmediate
nextTick 3
Resolved promise inside setImmediate
Rejected promise inside setImmediate

为什么前两个Promise.then/catch回调在process.nextTick回调之前调用？不应该像setImmediate部分那样，process.nextTick回调先于Promise回调？