Just before you first boot up, feel the network adapter. Should be ambient temperature.
After boot up feel again. Then as time progresses continue checking the wireless adapter.
Do so carefully - it may become very warm or even hot.
What you can do is to use a USB extension cable to raise the adapter up and away from the host computer.
Two benefits: 1) cooler air, and 2) likely improved transmission and reception.
Those adapters are made as cheaply as possible with little or no QA (Quality Assurance)
Another consideration - if that 30 minutes is very consistent look in Task Manager and Task Scheduler for some app or service launching around the same time. May be some buggy or corrupt software trying to launch, update, or...