It's completely normal to have multiple IPv6 addresses on one device. A device generates new 64 bits every once in a while and uses that in the IPv6 address. Because new addresses are generated regularly the addresses are marked as temporary interfaces.
Here are some potential fixes for your random Internet disconnects issues:
-Reset your router
-Update your WiFi adapter drivers and WiFi router firmware by checking the manufacturers’ websites.
-Contact your ISP and see if there are any connectivity issues in your area.
Change the power management
-Right-click your WiFi icon at the bottom right corner of your PC desktop and click Open Network and Sharing Center.
-Click Change adapter settings.
-Right-click your WiFi adapter and click Properties.
-Click Configure.
-Go to the Power Management tab. Untick the box next to Allow the computer to turn off this device to save power. Click OK.
Hope this resolves your Query!!
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