Wemos D1 Mini is disconnected and does not work

I have a disconnection problem. I currently use the BLYNK Edgent version. I can usually connect normally and reconnect to the WIFI after disconnection. However, I found a problem, that is, WEMOS D1 MINI will automatically be offline every Monday at 2:00 AM. The connection cannot be reconnected normally. It has been happening for 3 consecutive weeks. I have to reset or power off before the connection can work normally. Do you know which setting is the problem? Thank you.

Assuming that it’s not something that you’ve written into the sketch, then I assume that it’s probably either a scheduled reboot of your router, some other device on your network, or your ISP allocating a new dynamic IP address.