When wiznet5K library use, it occurs the problem.

[irinakim12]

https://docs.micropython.org/en/latest/library/network.WIZNET5K.html?highlight=wiznet5k#network.WIZNET5K
If you follow the contents of the docs site, it does not work normally,

wiznet5k.active(True)

should be entered.

I've already sent a pullrequest about that, but I don't know if it's being processed or if I need to do something.

#9956

[jimmo]

@irinakim12 The reviewers just have a lot to do! We will reply to your PR soon.