My wireless adapter only gets 144mbps when it used to get 300mbps. gaming computer builder

Alright. So I have ASUS USB-AC55 Wireless adapter( https://www.asus.com/ca-en/Networking/USBAC55/ ).

I used to be able to get 300mbps on it (it would say on my control center for it), but now it has been limited to 144mbps. I didn't do anything but it won't go past 144mbps. Any other information requested can possibly be provided. Please help.

submitted by /u/Tripzyyy
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