Hello, friend!
E5172As-22 is a consumer product, and our forum is focused on enterprise networking equipment.
For the first question, you need to confirm the purchase time of the device. If the device is aged because the device has been used for a long time, you are advised to replace the device. If the device is not aged, you are advised to contact the device provider for repair. If the device can be replaced within the warranty period, you are advised to replace the device.
The second problem is that it takes 28 seconds to log in to or switch to the device web page. You can clear the cache and check whether the fault persists.
If the problem is not resolved, you need to report the version of the device and your city.
Thank you!