Tasmota Get's disconnected all of a sudden

I have a Tasmota outlet controlling with MQTT. It works well.
However, at random times, after being on say for 2 weeks it all of a sudden turns Off and I have to manually turn it on via longing on to the IP.
I have a few outlets on one network and in most cases, all get turned off at once.
Any help or lead what this can be would be greatly appreciated.